I also run in Super mode. I did buy 2 Wifi to units to try. Worked without any issues. I just prefer a remote. I don’t have a lot of MTH so I should hopefully be set for some time with spare components. A lot of what I do involves switching moves.
As Vernon stated. You need to tether the remote to the new TIU. Becomes somewhat of a pain as the units have to be easily accessible to switch off. The idea of a tethered remote doesn’t bother me. I had an Al Trol throttle back towards the end of my conventional days with multiple stations to plug into. I watch a lot of videos of operation designed layouts and many use tethered throttles when running DCC. .
I spoke with Andy Edelman at the Springfield MA. show in January. I suggested coming up with sort of Y type cable with a receptacle box to plug the remote into. So that when running in Super Mode with a remote. The remote could be tethered to both TIU’s at the same time. Then maybe have the ability to expand the box to have stations at different locations around the layout. He was interested enough to right a reminder to check into it.