Upgrading to a new processor, or in the case of Framework, perhaps better hinges or keyboards or the like is IMO much more important to the long term desirability of a laptop than a 5% better keyboard or trackpad or RGB LEDs on the chassis.

I feel like the term "endgame" has completely lost its meaning - an "endgame" laptop is likely to be wholly irrelevant in at most ten years, especially so if you buy a super high end machine and expect high end machine things from it long term.

That's a weird argument/hypothetical, because the Framework is not worse than the very base model of a non-upgradeable laptop.