Agreed, it's just minority of users trying to defer extra $2500 upfront, and also about managing RAM capacity arms race. There is no engineering reason a laptop has to be upgraded _later_ to e.g. 8way/192GB/6TB configuration.

That said, I do think upgradable laptops are important as a resistance force against constant upgrades and planned obsolescence; if you could hypothetically add 2x32GB DDR4-2100 to a decade old ThinkPad and run stolen Apple Intelligence LLM just fine, the humanity wouldn't need $5k worth of labor wasted on one laptop per person per year.