> If you dig up an 18 year old Core 2 Duo box, upgrade its storage to a cheap SSD, and install Linux on it, it’s shocking how snappy and usable it is for most tasks… up until you open a web browser or Electron app. Then it all falls apart.

Can confirm. I'm typing this on such an old Core 2 Duo laptop running Debian and even with only 4GB of RAM and a mechanical HDD, it's still very fast for everything I do on it that doesn't involve Web browsers. Windows 10 is practically unusable on it however. The gazillion background things it insists on running bring it to a crawl, mostly stuck on disk I/O.