Very good Steve - got me off to a good start today that did. :)
There have certainly been several good folk music programmes here in Scotland in the past, and I don't see why it couldn't happen again, if the will was there.
"The Corries" had an excellent series in the 1980s. They did their thing, but what was great was the quality of the guests they had - I can remember Christy Moore, Finbar Furey, Loudon Wainwright III, the Chieftains, and, memorably, a stunning performance by Paco de Lucia.
The 1980s had a series recorded in Edinburgh, "Fiddles & Whistles An' A'", which had early "Silly Wizard", Dougie MacLean, June Tabor and Martin Simpson, the Albion Band.
I can't recall anything of similar quality since then, apart from some of the excellent productions on BBC Alba.
I started off taking an interest in this music, and was introduced to much of it in the first place by the programmes which my parents liked by "The Spinners" in the late 1960s. The folk scene at the time looked down their noses at them , and the Corries here in Scotland, but these were popular programmes, with respectable viewing figures.
It could happen again, but how to bring that about is the question. Any answers to that ? Would it be worth the effort ?