It could be… but it won’t be. Internals will be outmoded quickly, and I would be shocked if logic boards from ~5 years from now will still be compatible just as needs evolve (especially around cooling and power delivery)… and this is all before physical wear and tear on screen/keyboard/ports.

I would be very surprised if many frameworks are upgraded ship of Theseus style for decades, or if the total cost of ownership (and even ecological impact, most of the nastiness is going to be the electronic internals, not the metal casing) is lower than for someone buying a more integrated laptop ever 5-6 years.