Opinions needed: Ham radio digital modes -- what's currently being used?
While waiting for Kiwi 2 issues to get sorted out I started to take a look at Fldigi (open source ham digital mode decoder) with an eye toward adding a digital mode extension. I started by implementing the RSID function. Works fine.
But then I started listening around the bands. My conclusion is that no one is using RSID. A real shame. Worse, no one seems to be using any (or few) of the modes Fldigi supports. Let's set FT8(4)/JS8CALL/WSPR and RTTY aside for the moment. The rest of the activity seems to be VARA+chat or some version of PACTOR. Both of those are proprietary without any open source implementations I can find.
Now, I haven't listened for more than a few hours. But does this reflect reality? Would I be wasting my time porting more modes from Fldigi? It seems MFSK32/64 is useful (especially image mode) as that shows up in the Shortwave Radiogram transmissions. And I'm probably going to port the Fldigi CW decoder since it seems superior to what we have now.
I'd appreciate your opinions about this.