Do you really want to do window management and terminal tasks in your text editor? I'd rather use my window manager for managing windows, or my terminal for doing terminal tasks.
Take a cross split.
https://i.imgur.com/Flqexnq.png
I left neovim for vim, though, because of the known system clipboard pasting issue.
What clipboard issue is that? I couldn't find it online, and don't currently use neovim.
It makes it really easy to write Perl/c, compile and run it, search the history for output of previous runs etc. It's a big improvement on having to have multiple putty sessions, or even alt-tabbing between shells on a box with a UI.
I guess it all depends on your workflow though. I mainly use vim in a tiling wm environment on Linux, not through putty on Windows.