I got a 2014 Model S P85+ as a loaner while my car was in the service center. My first impression, before even driving the car was, "Wow, these older cars are really a lot looser around the seams." The doors felt loose, like they didn't seal up quite right. So then I started driving and what a racket! The new models are SO much quieter. I'm sure the low profile tires contributed a lot to the added road noise, but the overall noise levels were higher as well, roughly twice as loud subjectively when compared to my 2017 100D. The old-style seats are much flatter, without much side support. The headrest is too far back, making it pretty much impossible to use for my preferred seating angle anyway. I thought I'd like the leather seats, but they're just too slippery and hot here in the desert. Performance wise, it felt pretty much the same as my 100D, although it fell on its face at the loaner-limited 81 mph. No autopilot! What? No autopilot? And no TACC?!? I really missed those features. During the 7 hours I had use of the car, I drove about 200 miles. I neglected to open up the frunk, so I still haven't seen the cavernous opening that I've seen photos of. If only we could have that much space and still have dual motors. I'd give up the HEPA filter for the additional space in a heartbeat. The large wheels and low-profile tires make for a lot of wandering in the rutted roads of Arizona. I'm so glad I stuck with the smaller size. I much prefer the newer dash and door materials, although I would gladly swap my dark wood interior for the carbon fiber in the P85+. Supercharging in the P85+ takes quite a bit longer than in the 100D. Anyway, overall, the incremental and subtle changes Tesla has made over the past 3-4 years is very obvious when you jump back in time to the early model for the first time after having only experienced the current iteration. One more thing . . . I got on it from a stop to test the acceleration and noted that the car, being RWD, stepped out its tail just a bit before traction control caught it and brought things back into alignment again. That was fun! However, my wife wasn't amused. Oops!