I’m actually using nvim for rust development and it’s really fucking great but I’ve been using vi for like 25 years so for me the only issue was configuration, the editor is just natural for me. If you also have to learn the editor I don’t know what your experience will be.
As for configuring it for development I started with spacevim and managed with half the functionality normal IDE provides for quite some time. The experience was still good. About 6 months ago I set up nvim and now I have everything I need. I think setting up nvim for rust was as complicated as setting up spacevim. Spacevim provides way more out of the box but changing configuration is not easy at all.
I don’t worry about vim/nvim “schism”. The support is still great.
I would say just go with nvim, spend a week to set it up and don’t get too obsessive if small things don’t work. Enjoy the amazing responsiveness and great editor and you will figure out everything eventually. And if you have any questions just ask. I can share my config.