The last time I looked at this, which is some time ago, the single engine C of A fleet was about ½ the size of the Micro / LAA / Glider fleet. If you get even lighter then the numbers get even bigger. Do you have more up to date info?
No, I based my comment on the mid-air collision risk being related to aircraft actually in the air. Do you have any info on hours flown by the Micro/LAA/Glider fleet?
at least acknowledge that some of us are trying to be constructive
We all are. The constructive comment some of us are trying to make is that, attractive as FLARM seems to you, it is not a universal solution - simply because it is limited and uncertified and therefore not suitable for many aircraft that operate in uncontrolled airspace, and who already carry Mode C/S.
For example this, thankfully non-fatal, accident, which could have been avoided by the glider pilot turning the transponder on...
mindensoaringclub.com - Glider pilot survives mid-air collision with jet
The fact the CAA's mandatory Mode S was defeated (a good thing) doesn't mean that people shouldn't be (constructively) encouraged to fit Mode C. I still stand by my guess that the majority of hours flown VFR below 5000' are in types that carry Mode C (or S).
FLARM is simply not going to happen, except in bubbles of airspace where users congregate. Fitting Mode C brings benefits to other aircraft and ATC, and you have the option of adding a PCAS box.