Upgrading broke things in some surprising ways. Most (not all) icons are gone in my Plasma panels now. It's a good excuse for me to finally play with #sway and go full #wayland though, which has been excellent 😁. I suspect it's my config that broke as opposed to some flaw in the new release (or maybe both?).
Thanks to everyone on these projects for your hard work. You're making a difference and pushing open source forward!