[traceroute66]

> If they've moved away from it, it's a relatively recent change (last five years or so).

So the TL;DR is we are not disagreeing then ? ;)

I never expressed any doubt that traditionally ISDN absolutely was the lifeblood of broadcast, there is zero doubt about that.

What I am saying is that was then and now is now. We are now sitting here in 2026 and the world of comms has moved on dramatically and the broadcast world has moved along with it and that those people still clinging on to legacy ISDN will be forced to shift to IP-based technologies because they will be forcibly disconnected by their telcos very soon (1–5 years).

The reality is also that here in 2026 we live in a world where (a) you have a 4k tv and high-end audio system in your home ... so there is a natural limitation on what utility ISDN has in this world, and (b) the general public is increasingly consuming the media produced by the broacaster via IP means (streams over 5G-IP to mobile, streams over IP to Apple TV boxes) ... so if a broadcaster can escape the un-necessary complexity (and cost) of transcoding ISDN-received content to IP and shift to an IP-to-IP environment, why would they not want to do that ?