I installed Debian + KDE on my mom’s laptop. She hasn’t had a complaint since. How tech-savvy is she, you ask? I’m sitting with her right now, so out of politeness she put on headphones to watch her favorite soap opera. Mind you, the headphones weren’t plugged into the laptop. She was sitting there, headphones on her head, sound coming through the speakers, watching her soaps like this is how it’s meant to be done.
I installed Linux Mint on my dad’s laptop. The laptop previously had Windows 10 installed on it and it took approximately 10 minutes to boot. Now it boots in like 1 minute. The only thing that he doesn’t like is that he has to use LibreOffice instead of Microsoft Office and he has not get used to it yet.