Very valid point. Despite going forward without remotes the reality of it is there are more remotes and TIUs than Wifi and TIUs. Seems they would still have to support the remote if with nothing else but compatibility.
There is another thread here about issues with the wifi app and the latest Apple iPad OS. The implication is that changes will have to be implemented in the app to keep up with changes in OSes. My experience with Apple OSes is they make many apps obsolete in less than 5 years and if not the App then the hardware it resides on.
Who knows, the remotes may well outlive any software dependent alternative.