Sunfish. The answer is ADSB-In.
Work with what we’ve got, as in the system we have. Don’t try to reinvent the wheel. ADSB out has been chosen.
Spend your own money to be as safe as you can, because other than your loved one, nobody else really cares if you live or die!
The same goes with cars. Buy the biggest most heaviest and safest car with the most airbags, because if you buy a tiny little thing, the laws of physics are not on your side!