That’s fair, some models do still have serviceable RAM. From picking random models on Lenovo’s site and googling them it seems to be the majority of advertised

That’s fair, some models do still have serviceable RAM. From picking random models on Lenovo’s site and googling them it seems to be the majority of advertised models that are non-upgradeable. That said, even if you can swap it out, a RAM upgrade only gets you so far. Your display, webcam, CPU, wifi, graphics etc all stay behind. In my opinion the age of upgrading laptops easily is behind us - for years, adding RAM and an SSD was the way to rejuvenate an old laptop, but even if a modern laptop is upgradeable I don’t see these things really helping much.