Yeah; and batteries can be replaced when they start losing their charge. New batteries are pretty cheap.

I had an iPhone 6s that I used for about 5-6 years before upgrading and giving it to a friend to use. I replaced its battery at about the 4 year mark, and as far as I know it’s still going strong. I wanted to upgrade it earlier than that, and I could afford to - but why bother when my phone already did everything I needed it to do?

3 years of security updates is a joke. The hardware easily lasts over a decade if you want it to.

My Nokia 8 (bought April 2019) doesn't last a day anymore. Not even half a day. The battery is so done, I must basically always have my powerbank in my backpack. :) When it's cold outside (let's say around 4 °C) it's not uncommon for the phone to suddenly shut down while using certain apps, even when it thinks the battery is at 50%, it just can't provide enough power in those situations anymore.

When I bought the phone the battery was one downside I thought about but thought "it will probably be OK". I was wrong ^^ And due to its aluminum unibody construction you must remove the display to replace the battery, nothing I would want to risk on my daily driver device.

I have a similar experience.

There was a site posted here on HN that was something like: "All you wanted to know about batteries" or something like that. About Li-Ion they wrote, that they age faster if the charge falls under 20% (don't remember why) or gets charged over 80% (more voltage needed to push electrons in, battery heats up). GigaSet limits the charging to 90%. I use BatteryBot Pro from F-Droid (installed via Foxy Droid) to ring an alarm at 30%, 75% and 80%. [add] Depleting them completely is very bad for them.

Yep, some people seem to have a proclivity towards thinking that whatever is (or seems) disadvantageous to them (or a group they identify with) is somehow done on purpose by someone/a group that will profit from the said thing.

But if you think about it, it doesn't even work here. First of all, no one can tell you that your battery has a poor capacity, because you test it daily. And people are pretty sensitive to this issue, because we have tricked the manufacturers to create phones that have just enough capacity. (By requiring faster phones, larger, better screens and thinner phones. And not requiring a battery that lasts much more than a day.)

Actually that 'narrative' has the opposite effect: there are a lot of articles online that tell you how to enhance the life of the batteries. (Whether it's really needed or not doesn't make a difference.)

Regarding charging it from 50%: this is not something that hurts Li batteries. Actually it's better than allowing it to drain (or go into some unspecified low percentages, probably below 20 or 10). Charging to 100% is said to have a negative effect. I mean it probably wears faster than if you charge to just 85%.