I didn’t say I have any problems.
This is conscious decision not to have Nautilus. And, also for the moment not to have Wayland. I have no bugs with Nemo. I can always reactivate Wayland, but if and when Wayland would be mature enough to replace X.
Yes, I have set up Ubuntu to work with Nemo 4.06, sometime in December 2018. That was done after I’ve been testing Unity with Nemo. I also wanted to know, if this default Ubuntu would work without the new Nautilus. It works. The idea is to keep on testing this Ubuntu until 20.04 LTS.
(I don’t like apps that take away features, so the dislike to new Nautilus. I believe people should learn from the File Explorer, the oldest one, always adding features.)