I just use, hmmm:

  `tt` binds to `:tabnew`
  `gt` binds to `:nexttab`
  `gT` bindts to `:prevtab`

I can `vsplit` (yeah diff!) and `vsplit` again and I can do `split` and I can do hmmm, `ctrl shift hjkl` to cycle. Anything more I can't. I am bad at managing and mentally mapping buffers. Ditto for `tmux`. It's easier for me to manage multiple windows (yeah tiling manager!) than vim/tmux's buffer. Aaaand I can recycle that knowledge for any apps.