I looked at Dino and another one mentioned here and they look dated. Windows 95 feel with better anti-aliasing, rounder corners, but same colors? Gtk 2 or something?
Looks like a standard GTK4 app to me. Whether or not that is to someone’s tastes is obviously subjective, but it uses the same design language as every other GTK app under the sun.
GTK apps always look out of place on Windows though. Looks far more sensible in its native environment (i.e. *nix running GNOME).
A plastic nob is cheaper than a touchscreen, yes. But if you’ve already got a touchscreen as part of the design anyway (for things like satnav or car maintenance data), it’s cheaper to not include any other buttons or inputs and to bundle them all up into one interface.