Have you tried playing with the Advanced options in ABRP, @Big Earl ? Have you found them to be accurate?
Our litmus test for an EV and the charging network has always been a trip from DC to Cape Cod, and I was surprised that even when I set ABRP to 30 MPH headwinds, 30 degrees Fahrenheit, and heavy snow, the SR+ can still make it (albeit with an extra 2 hours of supercharging stops). So the frequency of superchargers (at least along the East coast) makes almost any trip feasible if ABRP is to be believed.
Yes, I routinely use the advanced options and I've found them to be very accurate. It also improves over time as more people contribute data by logging into their Tesla account through ABRP. Note that some cars are still in alpha stage on ABRP, so the calculations are still being refined.
I think an SR+ can make it most places along the Supercharger network, even in the worst weather conditions. There are a couple of expanses that are too far apart, like Murdo, SD and Rapid City, SD (134 miles apart), but those gaps will get filled in (Wall, SD is currently permitted but construction hasn't started).
You'll always be able to make it from DC to Cape Cod because I-95 is saturated with Superchargers. Bad weather just means more time spent charging. The largest gap on the New Jersey Turnpike right now is Paulsboro, NJ to Cranbury, NJ at 63.8 miles but there are three locations in between there just off of the turnpike.
The West Coast is a little trickier due to the greater expanses between metropolitan areas. Eugene, OR to Grants Pass, OR on I-5 is 138.6 miles apart, which would be a stretch for an SR in adverse weather.