Ask HN: Best computer that can't run a modern browser

That will run modern browsers just fine. I have an X201 tablet which is slightly older than that, and I only stopped using it because of a CPU cooling issue. It ran Windows 10 and up-to-date Chrome no problem.

A Nintendo DS, Jucebox, or other hackable early 2000s toy, or a similar modern device(Maybe one of those emulator handhelds can do it) probably wins on price, style, and being cheap and low power enough to actually get the benefits of low specs.