My icons I never change. Sometimes add to and shift inside a folder. Wallpaper however, I'm constantly changing. Sometimes daily.
My weather widget has changed a couple of times. Also, I recently added a third screen just for widgets. It's a jumbled mess, but it's tucked away behind my second screen. I don't see it unless I need it.
I change the layout very rarely. Most of my icons are folders with swipe up actions and muscle memory makes things easier. From time to time I change the wallpaper, colours in my Zooper Widgets to match and maybe edit the icons from a different pack.
Yeah I usually don't change anything for a couple of weeks then decide to drastically change everything, launcher, wallpaper, layout, icon pack. So guess what I'll be doing tonight for 2 hours lol.
I change my icons and wallpaper all the time (sometimes daily). However, rarely do I change the layout and if I do it's one of two different layouts that I switch back and forth.
I've recently found a layout that I really like. So I doubt that it will change any time soon. On the other hand, my wallpaper will change sometimes multiple times a day.