In my experience it hasn't made any difference, I've had my poco x3 pro for almost exactly 2 years, battery life is still able to support all day usage. In that time it was charged on average once a day with it's 33W charger. I think it''s way more of a problem personally if a person is using it for high CPU use at the same time as charging, or leaving it on charge all night. This is one reason I bought my new phone, as it only needs approx 30 mins to charge from 20-100%, 20% is the lowest I try to get before charging it again. Longevity isn't really a problem for me, as I would normally swap phones every 1-2 years max. I'd much rather enjoy the benefits of high speed charging, in fact I considered getting a worse cpu and getting 120W or higher charging speed.
At the moment, I am still using both phones daily, and because of this I am now only having to charge once every 2 days on each phone. And actually on Android 13, the battery use seems substantially better... eg last night I charged my new phone to 100% before going to bed, took it off the charger and only used it once for a 5 min gaming session, went to sleep with it still being 100%... this morning battery still at 100%. On every phone I had previous to this I lost at least 2-3% overnight, sometimes as high as 8-12% with phone in sleep mode, not off completely.
Anyway, I thank you for your input, I know it was well meant. I just don't think some of those studies are very accurate, at least not in my experience of having a number of smartphones through the years. In fact my brother is still using the pocophone F1 I had since it came out, after I'd had it for around 18 months and daily charging. And he'd been using it a lot whilst charging for at least 2 years and sometimes several charges per day... and it's still working fine even now as his backup phone that he still uses daily. Admittedly the battery longevity went down a bit as he didn't know he shouldn't really use it for gaming etc whilst charging, but since I told him, he was much better at trying to charge when not in use... and since then the battery is holding steady still. If needs be I'll swap the battery out for him, it's like £10-15 IIRC. But seeing as he has another phone now as his primary, he'll probably just use it 'til it doesn't work anymore.