My husband, who mostly codes in assembly these days (he's mostly retired so his hobby is old atari, amstrad, and spectrum computers), went from VSCode, to Sublime, to now Kate. He prefers to use 100% open source apps, without strings attached. VSCode is nice, but it has lots of weird stuff in it that aren't necessarily up to the spirit of open source. So Kate works perfectly for him, although VSCodium would do well as well (it's just that Kate has better syntax highlighters for his weird assembly). Also VSCode/ium is using about 250 MB of RAM, while Kate about 45 (and Sublime only about 32).