Wasn't too late for Part 61!!
And VFR aircraft got a last minute exemption from the ADSB madness.
Its primarily GA IFR aircraft that fly below 10,000 ft who are being screwed by CASA / AsA.
There is no safety benefit for IFR aircraft in class G airspace. There is no cost / flight routing / traffic separation benefit in class G. Zilch, nada, none.
Australia is the only country in the world that is mandating ADSB for all IFR in all classes of airspace at all levels.
And Dick left out some costs. Any aircraft with a non WAAS GPS (ie anything made by King or Trimble, plus Garmin 150 & 300 series and 400 & 500 series non WAAS) will require:
ADSB transponder
New grey code altitude encoder
WAAS GPS
New WAAS gps antennae
New coax cable for the WAAS GPS antennae
Sundry engineering orders for the installation (another special Australian notion)
An avioincs rack re-layout if the new GPS is taller than the old one (ie if the existing GPS is a Garmin 155XL, 300XL or King 89 / 94)
If the installation is (say) a Garmin 430 or 650 and it replaces an old King Nav/com (for example) then a new GPS compatible indicator will be required.
This could easily top $25k