Not a convincing argument for the WiFi adapter or to update my TIU.
Upgrading to DCS 5.0, in addition to adding support for the WiFi App and WIU, also corrects several bugs that are in DCS 4.20 and has a much improved lashup process. Additionally, being on the latest release of DCS improves the ability of other slo help you with any issues that you may encounter. Upgrading is primarily to your benefit, not mine.
As far as complete DCS App control over accessories and switch tracks, that's coming this Spring.
If you have concerns about upgrading your DCS, you could get it done, for a nominal fee, by your local MTH dealer.
I have the "DCS Companion 2nd Edition". Why should I move to the third edition?
Because, in addition to a discussion of the DCS WiFi App and the WIU, it also contains quite a bit of other additional information, corrections and an Index.
Regardless, at $14.95 for the eBook or $34.95 for the print book, it's arguably among the least expensive accessories available for DCS. 
