Dell Latitude and Lenovo Thinkpad parts are pretty easy to come by on eBay. I’ve bought a handful of different parts from drive caddies, OEM batteries, hinge assemblies, keyboards, and trackpads without much drama. Dell Latitude service manuals are top notch with detailed procedures and diagrams. Dell has a decent track record of maintaining their firmware for a reasonable number of years after release.
How about in five years from now when all of that is still fine, but you just want to replace the mainboard.
What about when framework comes out with upgrades down the line? The great thing is because they’re so modular you can just buy that and slap it in without having to buy an entirely new machine.
That’s the appeal