Once upon a time I was the person that was constantly messing with my shell. I would performance tune it, try out new plugins weekly, change my config often. It honestly became a huge waste of time. Since switching to fish I literally haven’t spent any time configuring it at all, besides adding in the fzf plugin and the fzf-marks plugin. It just works. And it has all of the same features that everyone adds to zsh with plugins straight out of the box.
If you’re happy with the default in bash or zsh then you will be even more happy with the default in fish, as it’s just much much more user friendly (which is why so many people add so many plugins to bash and zsh: to make it more user friendly). You can even configure it (even the colors) with a web interface! No mucking about in text files if you don’t want to.