There are actually plenty of modular laptops. This one doesn't look terrible but there are plenty of other options.

Thinkpads have a pretty good reputation. You can also get big "desktop in a laptop" style PCs, and generally, the thick gaming laptops tend to be easy to work with. You can look at Clevo, which is known for being the OEM for many off-brand PCs, notably System76. If you are a bit more extreme, you can look at Panasonic Toughbooks: hardened, industrial laptops with plenty of swapable modules.

Framework have the advantage of being thin and light, most modular laptops are on the big side. It means it fits a niche. However, if re-usability is your goal, keep in mind that it is a startup, it may fail, and if that happens, forget about support and spare parts. By comparison, Lenovo is not going anywhere.