I recently had to throw out a first gen iPad that was physically still in mint condition (even including the battery, somehow), simply for the lack of support essentially turning it into a useless brick.
I understand that Apple can't provide upgrades for free, but why can't I buy an upgrade for $30 or whatever? Better than throwing away perfectly good devices.
And they won't let anyone install any other software onto the hardware, so I can't even rely on the free market providing what I want.
IMO this is one of the biggest gaps in the new EU repair rules (from what I have seen of it). It should mandate unlockable bootloaders, etc. or at the very least an unlockable bootloader once the regular support period is over.
Imagine the cool things people could do with old iPads. Put Android or Ubuntu Touch and give it to people who cannot afford a tablet. Wall display for Home Assistant. Rip out the batteries and have a very low energy ARM server, etc.