I have 2 wifi units. I rarely use them, preferring the remotes (I have 4 remotes, plus one on lend-lease to a grandson along with an original issue Rev G TIU).
I often have several trains running at once on interconnected routes, and I find it takes too much time to scroll screens horizontally or vertically, or press an icon, to get to the control I need. If I only ran one at a time, or on sepArate routes, the wifi would be more usable.