I have enabled "charge up to maximum 80%" setting on my phone from day 1, and 2 years later the battery lasts noticeably less. maybe it would have been even worse without that setting.
I wonder if it's because phone thermals are way worse so always heating up?
YMMV. Likewise, I've been using charge to 80% from the start, the phone is approaching 5 years, and I can't say I'd notice the battery being any worse from new.
Bigger issue is that it's been out of OEM updates for 3 years now, which is complete balls considering it's a reputable brand and came with "Android Enterprise Recommended" or whatever that was.