There’s nothing wrong with using traditional antennas, digital goes over the same air spectrum, where the problem comes in is in the interpreting of those signals picked up by the antennas. Not sure why the cable companies would be educating anybody, if you get cable you’re already set for the change, I suppose it’s not a bad way for them to get more customers though.
I love how they tell people that for HD you “must” have cable/satellite/FTTH.
I’m looking forward to putting a pcHDTV card in my system for over the air UHF broadcasts. Glad I didn’t throw those old antennas out! Things come full circle — now going back to OTA after 20 years on cable.