Yes it does because no manufacturer claims the lifespan in years, they say you get 2000 charging cycles. The 5 year number is derived from 2000 / 365 = 5.48 and that assumes you are charging them fully every day.
Look buddy, I’m not a battery expert and I can tell you aren’t either. You can’t get an easy number because the chemistry is complex and the way you use them changes things. When you do get a nice clean year number it depends on many things so making broad proclamations isn’t very useful.
Fair point. Sustainability really should be a priority. I don’t always return them to the case because a don’t use them for too long at a time. But even if I do, charging them for 10% isn’t the same as charging them for 100%. (I’m just stating that because the “5 year battery life claim” is absurd).
If you’re a heavy user wired ones will probably be better for you, but I reccoment trying out both. I was really against the bluetooth ones before I bought a pair and now I’m really happy with them. It all depends on your situation.