These things look beautiful on the web page. But dang it's so hard to get your terminal, Tmux and Vim/NeoVim to display properly. I've literally used Distinguished as my color scheme for 10 years just because I got it working, it looks nice and I really don't want to fight with configs.
I'm still not interested in using VSCode as my daily driver though. I tried it for about 6 months solid. It wasn't for me.
* export TERM=xterm-256color
* Use tmux attach -2 (-2=256color)
* In tmux <c-b>:set -g escape-time 0
* In vim, :set t_Co=256
If your terminal is the issue, use rxvt-unicode256color as it is the best terminal emulator (kitty is too slow (Python), urxvtd can segfault, xterm lacks features), or iTerm2 for Mac (Terminal.app recently broke colors and haven't figured out how to fix them, plus it lacks panes which I use to simulate an i3 environment). On Mac you have to enable option as meta key to make alt work as well
I looked it up and found https://github.com/kovidgoyal/kitty/issues/330 where the dev says:
> that's just python interpreter startup time
So... The answer is just "yeah it's slow". When you're used to a few milliseconds for terminal spawn, .5s is eons.