I run Legacy - TMCC locs only (Lionel-Atlas-3rd Rail + converted WBB). DCS is something that I never incorporated into my layouts for several reasons so I no longer have any MTH locs & I divested two Z-4000s in favor of the Lionel ZW-L.
Right decisions - for me.
I have rolling stock from Lionel + Atlas + MTH.
My fav. brand, then, has the Lionel control system & I'm "loyal" to it.