@HansGruber or is it @AeroDyn ? You both seem to have a very similar style of writing posts (also similar to Neil Murg, who has been very quiet recently), so hopefully I’ve found the right person(s).
Anyway, the big problem with PilotAware is P3i. Very few other manufacturer’s devices receive it, and it is in 3rd place behind FLARM and ADS-B in the numbers of aircraft transmitting it in the UK alone. When you look at it globally, then P3i emissions are minuscule and we have to have a system that is international and not mainly UK focused (ADS-B is best for this, followed by FLARM, although that uses different frequencies in different countries). So as a receiver, the PilotAware product is pretty good, but as a transmitter it sucks - and when it comes to form factor as carry-on kit it is no better than the awful Stratux (just look at them!). [photo credit @VinceGod ]
Now if every ICAO nation agreed that P3i was the future protocol to be used, and that every air user and EC manufacturer was going to field it, then great. But somehow I think that is unlikely when literally billions of £s/$s/€s (or any other currency) has been spent globally updating aircraft, air traffic ground infrastructure and satellites to use ADS-B. When you consider that I think that scenario of world-wide adoption of P3i is very
unlikely, don’t you?