Well yeah. You barely use groups on a personal machine - maybe once and done for audio and VMs, depending on what distro you use - and at work you'd automate that shit, probably have it centralised.
I try to remember commands backwards by how they look(<command> <flags> <arguments>), if they are short, have capital letters and so on... Is that weird? If I give up I open the history file or my good ol' cheat sheet.
I did use it but the only real benefit for me as a hobbyist was the git status indicator on the prompt and the easy to configure prompt. The rest of the indicators did not help me since I'm not a developer. Now I just have my custom prompt with colors, and custom git info.
Fish does history autocomplete, not Starship — you still have autocomplete using unconfigured Fish, and you don't get autocompletion by enabling Starship for other shells.
I quite sure fish has it, but I use zsh without autocompletions, I just press tab until I find what I need. And the fzf history shortcuts for the rest.