People are already complaining (see: this very thread:-), but also note that people are complaining about Lemmy too - e.g. slrpnk.net about to switch to PieFed, due to frustrations with long-standing bugs.

People always complain, the important thing is to move forward with something that is going to work. Personally I think Lemmy will not, though I would be happy to be proven wrong, and I am pinning all hopes on PieFed - worst case there is that they both succeed, which would be fantastic 😍.

Yes I hear what you are saying about resources and complexity (learning Rust is somewhat complicated as well though...), but right now the subscriber counts across the entire Threadiverse are dropping not rising, so that will be a wonderful problem to have to solve one day, if we ever get to that point.