Most (if not all) current phones available in the market cannot even boot without a battery connected, is that correct? I'd feel a lot more comfortable without having to worry about it and risking forgetting about it for any unspecified amount of time just to find a pillow protruding from the back case. I really find it a shame that we have relatively powerful, energy efficient, mass produced devices in our pockets we eventually dispose of when they could have a second life serving another purpose. postmarketOS is a really interesting project, and if most phone manufacturers weren't actively user-hostile I could've used some old phone instead of my Pi(s) for whatever project I'm interested into, but I however think it's fruitless until strict regulations allow users to do whatever they wish with their handheld PCs. Due to this, among other things, I find all the talk about recycling and whatnot hypocritical from big companies, that should be the last stage of something's life, not dictated by obsolete security patches or the likes.