There are workarounds to almost every issue you may have. You can run Windows in a VM for software that requires it, or dual boot. M$ Office can be ran in a browser now. There is no reason to buy a license, just DL windows10 direct from M$ and never register, all they do is lock you out of some display options and add a watermark to your desktop.
It’s weird that Linux certification requires rote-memorization of commands. The only people who make any effort to memorize commands are newbies and people studding for exams. You will always have access to bash history, man, and --help, even from an offline machine.
Every command I’ve memorized is simply the natural process of repetition. Is that your experience?