Yeah the Leaf ~2011 is infamous as an earlier "bad" battery design so I wouldn't extrapolate too much from it. The reality is also that as battery capacity increases, people simply won't notice 10-15% degradation of the pack because their commute is so much shorter than the vehicule's range.
And I'm not really extrapolating too much from it, as I expect our soon-to-be-in-the-driveway Ioniq 5 to perform much better (as in, outlives me). The Leaf was the first mass-market electric car in, what, 100 years? Yeah, we expected some early-adopter teething pains (including a short-lived battery), and we have no complaints with the OG Leaf, enough so that we swore off ICE vehicles years ago and await our 2nd electric car.
But at the same time, it's a counter to Nissan marketing guy trying to mansplain to me about their battery lifecycle. I own one of your batteries, Marketing Guy, and I'm detecting slight hints of marketing bullshit.