Yesterday's Guardian report - or at least its headline - is, I must say, not quite what I understood of the BBC's plan when it was published on Monday (http://downloads.bbc.co.uk/aboutthebbc/reports/annualplan/annual-plan-2021-22.pdf).
The Beeb actually talk about moving to more "series of scale" in the arts and music genres, and that "This approach will necessitate a shift away from commissioning a high volume of lower cost programmes on BBC Four, which are less effective at reaching audiences".
Thus, "BBC Four will become the home of the most distinctive content from across the BBC's archive. It will also remain the home for performance, such as the BBC Proms, BBC Young Dancer and BBC Young Musician. It will continue to showcase arts and music acquisitions and maintain its unique role in partnering with arts institutions."
(Indeed, the plan to move the bulk and focus of such original programming from Four to Two was outlined in May last year, so even that is not news.)
So explicitly not an archive-only channel, but certainly more archive-focused. Comedy-wise, if that means more under-seen gems from the archive being aired, that's no bad thing in my book; whilst I'm sure it was announced at least two years ago that they would be cutting their comedy commissioning to effective zero. Indeed, they only broadcast one single half-hour of new comedy in the whole of 2020 (A Year In The Life Of A Year).