Maintaining a theme ~a decade after its creation is minimal effort. You can check the commit history yourself and see it's a one line change once in a while among auto dependency bumps thanks to a >10k line package-lock.json, at least half of which is unrelated to core functionality as demonstrated by t3dotgg.

It's also funny to see a "supposed software engineer" shit on other's tools and post veiled personal attacks based on a single Internet comment. If I were you I'd probably insinuate you've never worked on any large code base so don't know LoC definitely correlates with complexity as a rough first signal (not to mention I included a rough analysis of actual code as well), but I shouldn't do that based on a single comment. Anyway I've maintained plenty of open source code bases large and small, popular (>10k stars, yes that's not a very good metric but it's also a useful first signal) or not, so I'm pretty well equipped to evaluate maintenance burden.