openSUSE still "uses" YaST, as in, if you choose to change something via YaST, it will happily do so. You can also simply install/uninstall various components. It also happily integrates with changes made elsewhere (e.g. the "Firewall"-module wraps around firewalld nowadays, which you can influence either via YaST or firewall-cmd etc.).

I sometimes use the Package Management part of it, since searching for something is sometimes quite nice in it. That said, I don't use it for installing software or doing updates etc., so you can absolutely use e.g. zypper & YaST side-by-side.

Oh, it's still there, we just never use it. Or mention it in polite company.