> an unlockable bootloader once the regular support period is over

If we're talking about a 15-year old device, it definitely feels like requiring (1) a boot loader unlock method & (2) all technical specs required for basic functioning (display, input, compute) aren't overly burdensome on Apple et al.

Essentially mandating a corporate 'methods and specifications' EOL requirement to avoid device obsolescence.

This would also have a side effect of giving the EU a regulatory trade barrier against sketchy fly-by-night Chinese tech (e.g. "DMOAO tablet").

And encouraging tier I tech device manufacturers to offer longer warranties, in their own self-profit-interest.