[finchisko]

For me, the good compromise for start would be 3 devices per year per maker to have this prolonged support.

Probably I'm native, but also wonder, why there is no single manufacturer that offers payed updates after product EOL. Like subscription service, canonical is offering after LTS release is EOL.

[ncphil]

Because it is the phone manufacturers' suppliers, specifically the SoC manufacturers, who have created this mess for all the reasons previously stated upthread. Bright line regulations like those proposed (with some of the suggestions made here) would change that for the better.