alt Hacker NewsT42, T60, T62, T420, T520 (multiples of some around the house) here, ending at the point they changed the keyboard. All running linux, the T420 and T520 (with SSD's) are fine with modern browsers while the older ones can be slow on bloated sites. I imagine the RAM might be an issue with multiple electron apps though.
Only real maintenance is to use quality battery replacements (T420 lasts particularly well on batteries).
Got a good source for safe, reliable battery replacements? Last time I needed one I discovered that Duracell made them, but it seems like they've stopped now.