I sort of get the appeal of fine-tuning the terminal environment to perfection but after fiddling with such things for many years - decades - I ended up using mostly stock settings with a very few changes. The advantage of that approach is that I feel at home just about anywhere instead of just on my one or few customised systems. My customisations mostly consist of a local /bin directory with a few hundred scripts (wc -l now shows 263) I made over the years which I dump in a new environment plus a few additions to .bashrc (yes, bash, not one of the fancy replacements (zsh, fish, oil, ...) which are supposed to be better but in reality just end up being different) to set custom paths etc.