Just to opine as an owner of an S that we specifically bought because of the RFS: We are thrilled with our decision, but YMMV and all that. Some of the points that folks bring up on here we find ourselves on the opposite side and given the age of your older ones, the X may be the better call overall, but just in case you're curious about our decision, here are a few (and yes, all of this is debatable, it's just like, you know, our opinion man...)
- Hate SUVs. (Don't even get us started on minivans...) I realize the X is probably less SUV than SUV, but would gladly take any sort of hatchback/wagon over an SUV any day of the week. The S is faster, handles better, gets more range, can throw a roof rack on it with a roof box and/or bikes for road tripping, (IMO) looks better, and (while still a land yacht) is more fun to drive.
- At time of purchase, we had a 5 y/o and 3 y/o. The RFS is "their space" and it's great to be able to keep the rest of the car clean for adults. We also had our 2 y/o niece move in next door (yay! ) recently so now we're taking her to/from school as well, which means she is in a traditional rear facing CAR seat in the second row, and our 2 kids take the RFS. When our oldest outgrows the RFS, that'll be time for our niece to move back there, so they can swap. All this and we can STILL transport 2 more adults. Your older kids are much older, but as you know, putting 2 car seats in any car devours those seats, so saying you have a 7 pax SUV with two 3 y/o might be tricky when it comes to loading/unloading, depending on placement of said car seats. In our S, I can drop our 2 kids off at the grandparents, fold the RFS down, and have a full trunk again- no lugging around car seats and nobody having to do various acrobatics to climb over car seats to sit down.
- We believe the HVAC argument is a bit overstated. We live in PA and saw temps in 100F this summer and -10F this winter. Undoubtedly the rear window needs aftermarket tint. We got complaints from both kids in the dead of summer as we were taking our very first trip in the car, which (not coincidentally) happened to be the tint shop. We installed 35% back there with high IR blocking and it made all the difference. Combined with some pre-conditioning and using the factory guidance of selecting the fresh air (as opposed to recycle), we can get complaints from the RFS passengers that it's too cold in the middle of the day in the summer. In the winter time, we don't tend to have them wear their coats while sitting in car seats (whether they be traditional car seats or RFS- just something we're not comfortable with and they tend to hate the feeling of being so cramped.) That said, we keep 2 small blankets back there for when we leave the grandparents late at night and they're in their jammies. Again, pre-conditioning is key here, but we can get the cabin plenty warm and toss them in as the dash temp shows sub zero (I didn't mean sub freezing) and they'll kick the blankets off usually within a mile or so. (FTR, they ALSO like to use blankets on road trips in our Subaru.)
- There is plenty of room in the "cubbies" in the wheel wells for backpacks, jackets, umbrella, boots, etc. and we haven't run into a "space" issue using them day-to-day. (Grocery store trips has them in the RFS and enough groceries for a week in the frunk where things don't slide around.) I don't think I would take them on a 6+ hour drive with 5 other adults packed to the gills, but I honestly don't think ANYBODY would like that, and it's not something we've ever planned on doing. I will say that when we do our long trips (7+ hours) we will install their regular car seats so we have more convenient trunk space and have the ability to hand them stuff. Again, hard to discount the ability to add a roof box to greatly expand storage space. Can't do that on an X.
Our plan is to try and hang onto this car for a while, knowing that at SOME point, the RFS will likely no longer be usable by our immediate and extended family. Our best guess easily shows us having those seats filled by a little friend or two for at least another 7-10 years, after which point, who the hell knows what the car landscape will look like. Plus, the RFS are removable should we ever want to fully reclaim the trunk space when the kids have fully outgrown it.
Bottom line: It sounds so silly, but the RFS were one of THE top 3 selling points for us (electric + safety being the other two.) We briefly entertained the idea of the X, but it just didn't feel right to us, while the S feels like it became an immediate part of the family. Truth be told, my wife gave our S the same name of what our son
would've been named if he were born a girl. We figured, hell, the car payment on the S is as much as their 529 contribution, so might as well treat "her" like a member of the family.
Fortunately, no matter what you decide, you can't go wrong.