constant charging of a li-ion cell from flat to full, is the quickest way to reduce it’s lifespan,
Why would you need to constantly do that with new EVs having 200miles of range? Are you really driving none stop 400 miles+ every day?
BMS software also limits the rate at which EV packs recharge, most will slow down significantly after 80% for the reason you have pointed out, but again, do you actually need to rapid charge to 100% every time you recharge?
A far more common way to degrade EV batteries is actually not to charge it all - so left sitting on a dealer forecourt for months with a dead battery, or to keep it at 100% charged all the time - a reason why laptop batteries die so quickly.
The battery 'concerns' really have zero real life impact, especially if EVs remain at their current price levels, as most car buyers (especially used car buyers) wouldn't be able to afford them.