Hi Rob,
I noticed about month ago that the IR extension with the wired module has been silently discontinued. And because I had all the wiring already prepared, I immediately started seeking that item across local partners and luckily found one in stock.
That story revealed to me an unpleasant fact, that few more product are about to go away/have gone (and were replaced by proprietary alternatives). For example, water leak sensor (wired) has been replaced with AIR version, outdoor temperature / humidity 0-10V, external illumination sensor and/or wind speed sensor has been replaced with weather station, and few others.
You can call me old school, but I strongly prefer wired stuff over any wireless solution. I do have EnOcean extension though to help me solve some corner scenarios I forgot to wire properly (yes, three or four years ago there was almost nothing AIR). But even if I had AIR, I surely would not want to exchange the battery in a leak sensor placed behind the washing machine/dishwasher every two years.
I fully understand that deployment of an AIR based system is much easier and quicker, I am not quite sure if also cheaper, but the reliability is a key for me and that's why I am a bit disappointed about the future with Loxone products being majority AIR based.