BBC4, TOTP, OGWT, WTF?

Small, simple question:

Why doesn’t BBC4 do with The Old Grey Whistle Test what it’s done with TotP – ie repeating complete shows instead of reconstituted clips. It would be hugely entertaining, not always for the right reasons. And think of the fun we could have when it gets to the 80s and the Gruesome Twosome turn up….

Seriously, why not? Is there a reason?

https://www.youtube.com/watch?v=FfKWPyj51vU