I'm not that old, but every time I upgrade my PC or phone, some of my workflows break and I need to pointlessly re-learn things I'd rather not re-learn. UI buttons get moved around, icons change, some settings are removed and others are added... this was exciting the first ten or twenty times, but it's just tiring now.
Basically, I'm at this stage in life where my reaction to systemd wasn't "oh wow, this is progress" but "ugh, I need to learn how to start, stop, or modify services again". In another ten years, I'll probably just say "no, I'm not doing this again, just let me use my old computer for as long as possible".