> Manufacturers are trying very hard to have built-in obsolescence

This would be a golden opportunity for a manufacturer to come out with a promised 5+ year support cycle. I think one of the reason they don't is because each manufacturer has 78 slightly different models every year to support, but in a maturing market they should have a better idea on what the market wants and cut that down. Why does know one learn the limited SKUs lesson from apple?

In that respect the Librem phone is arriving at almost the perfect time, it's close to PC levels of supportability.