When quoting @mikelove's post of 2016 I did not want to start a discussion about the time Pleco 4.0 took so far and will still take. But whenever Pleco 4.0 will come out you certainly do not risk a system "that has been rushed out" - only that phrase sounds like a (seemingly unintended) joke to me.
Ah, well yes, one thing nobody will be able to say is that it was rushed out. (But that’s all the more reason we cannot in fact rush some parts of it, so it’s kind of a catch-22)