Just installed Chromixium on an ancient XP-era Pentium 4 (but with Hyperthreading :D) PC.
The interface is slick (as you would expect from something that mimics the Chrome OS), and the performance seems solid enough (as you would expect from an Ubuntu core). The constant thrashing that came with Win10 on this box have totally disappeared.
The only annoyance (so far) is that the @ and ” are switched; so when you type one you’ll get the other.
This box could become a good backup terminal – or even for the kids!