BTW the premise that only having transponder would mean that ATC would give larger separation around you is wrong, and a dangerous idea. You are (likely) not talking to ATC and not under their control (flight following would not count) and none of the close sequence future possible use of ADS-B would apply. They certainly don’t apply today where your approach/TRACON controllers likely cannot even tell you have ADS-B Out vs. a Transponder seen via SSR.

There is no scenario where equipping with ADS-B Out *reduces* safety.... or well OK as with many of these things if pilots think they are a silver bullet and rely on the traffic warnings too much and stop looking... but I hope that is awfully rare.