neovim's terminal is not a plugin, is baked in and is a proper terminal emulator, based on the libvterm library. So, it shouldn't have the same issue, it makes use of the async features in neovim.
Thanks for the explanation. I actually just downloaded neovim to try out this feature, and I must say that with neovim-remote this is incredible. I think i3 and neovim's terminal mode is about as close as I can get to an ideal desktop setup. Having a terminal that can send arbitrary keystrokes to your editor open up endless possibilities.
