Second, average age of car on the road is above 10 years in most countries; and those that drive old cars definitely do not have €26,500* spare to swap their EV's battery for a new one.
*That's what Audi charges here for e-tron 50 battery replacement, which are already starting to fail for many owners
By 10% over 10 years, assuming the worst case of nothing but ultra-fast charging. This seems minor.
Old cheaper cars could be 10% less convenient to use for very long trips. This should not shock anyone.
Rather than an expensive battery swap, sell it on at a lower price to someone who doesn't need 100% range.
From my personal family anecdotes: my mothers' 4 year old Hyundai Ioniq 5 had complete battery failure. Thankfully under warranty. And my fathers' 5 year old Audi e-tron 50 already has <80% range remaining, with very rare fast charging.