Yeah, they are stripping the lifetime supercharging, and lifetime premium connectivity, but I think that lifetime supercharging was only available until 2018 (so only one year model of the Model 3, and never on the Model Y). Most, if not all of the vehicles that came with lifetime supercharging were out of the bumper-to-bumper warranty by the time I was shopping last year.
I was nervous with buying unseen, but after my experience with my TM3, it was settled. I also bought my '21 TMY 7-seater the same way. During delivery inspection of the TMY, I pointed out all the issues I found, it resulted in tesla replacing 3 door skins (drivers, passenger front, and passenger rear). The bumper-to-bumper warranty addressed any other issues I found. In the end, I have 2 vehicles that look almost new, drive perfectly, have Acceleration Boost, and FSD.
Another good thing is, here most used from Tesla vehicles are off lease. Tesla never (as I understand it) allowed lease buyouts on 3/Y, and have stopped on the S/X. Because of this, and how strict Tesla is on lease returns (I would never lease from Tesla), they are really in good shape when they go up for sale.
EDIT: It is a good thing that I had the bumper-to-bumper on my 2019 TM3, it has the PCS failure issue. Apparently, it is more common in 2018 and earlier TM3s. It would have been a $1,800 job after warranty, and isn't covered under the battery/powertrain warranty.