I mean this used to be true. But for years and years now RAM capacity hasn't meaningfully changed. My first laptop almost 10 years ago now had 8gb of memory. And I now have 16gb of which I'm currently using only 3.1gb, while running chrome, slack, thunderbird, vs code and telegram. I would be fine with 8gb as well.
The point being that memory upgrades to increase capacity is really not important anymore due to capacity having stagnated for the most part.
I kinda agree. That does require everyone buying high-spec laptops in the first place though. Many people were buying laptops with 2gb or 4gb of RAM 10 years ago, many of which will be useable now if upgradeable to 8gb, but not otherwise.
Experience of 99% of people is that component ______ never fails. By that logic no electronic component needs to be replaceable/repairable and the whole repairability discussion is useless gibbery.
SSDs and external connectors definitely fail, though, and they should be repairable/replaceable.