On windows when you middle click an application it’ll open it in a new window, this sometimes would let you open multiple windows of an application that typically isn’t an option elsewhere.
Hypothetically I have Firefox open, if I middle click on the Firefox .desktop file again it would open a second Firefox in a new window.
ASUS NUC’s are great for simple self hosting needs, got a 13th gen NUC myself with an i7, Proxmox as the host with a headless Debian 13 VM for a virtualized environment.