This topic certainly seems to have introduced a lot of people to the BBC radio threads even if half of them don't seem to understand how it works.
On Mudcat every reply is listed in order, so if someone starts a thread about banjo playing in Mongolia, after about thirty postings it can become a thread about treacle mining in Burgess Hill.
With the BBC way of doing things, if you want to make a contribution about Banjos you click on to the first reply and it is added below that one. If you want to talk about treacle you reply to the later posting and it appears below that.
I see on the classical music forum they are complaining about all the jazz and world music on Radio 3!