Can't speak for the commenter, but I used to work for a team couple years ago that used rust and tokio extensively, and some projects were just not a good fit. At the time, futures were well fleshed out but the community hadn't caught up, so we were lacking a futures-compatible postgres and redis client. We wrote the redis client ourselves, and for the main project using rust that was sufficient. But for postgres, that was a show stopper for any other projects we were working on. So we ended up deciding between typescript and go for those.