@voltagex ATSC 3.0 is IP-based, doing some OTT-like shenanigans. There are reasons for it being so slowly adopted. Not entirely unlike MSYNC and other stuff.
Here is an ATSC 1 off-air recording with both CEA-608 and CEA-708 captions, taken just now: https://e.pcloud.link/publink/show?code=XZzoetZdTW44cf2pDSeaqyODEtrjLplsrDX