I’ve used both and completely agree.
i used fvwm for some 20 years. but when I switched to Wayland, I had to change window managers. I tried gnome first because it was the default on more distributions. works great as long as u use it as is . any customization is hard and needs gnome tweaks or some other extension…
kde plasma was just as light weight and completely configurable
IIRC u need mlocate or plocate…