My friends son has a Tesla model Y and we borrowed it yesterday. We were doing a 308 mile round trip (154 miles each way) with four adults and no luggage.
He picked me up with a full charge, after ninety miles we stopped for breakfast and it had dropped to 51% charge. The services had no Tesla superchargers and the "fast" chargers they had were all in use so he plugged it in to a non fast charger. By the time we'd finished breakfast (we were deliberately slow), it had only charged to 82%. We continued our journey and on the return trip, the sat nav wanted to divert us via the superchargers at the M11 Stortford junction because it was predicting we couldn't complete our journey and was showing -12% in red.
We stopped at the same place on the way home, managed to get one of the faster chargers and it topped up to 90% so we managed the journey back with no issues.
We do this trip once a year, we normally stop for a quick break on the way up and don't stop on the way back. As a result of taking the Tesla, it took longer to get there, longer to get home and there was a mild case of range anxiety. The car was in normal mode, not sporty or anything fancy like that, it was driven to the speed limit and very rarely booted hard.
I believe the estimated range is 270 miles on a charge. I appreciate that's under ideal conditions but we'd have been lucky to get 180 miles on a charge. That's still pretty poor, isn't it?