The Basement Tapes were made in '67 and via cover versions, The Band themselves making two landmark LPs, and people in the industry (including The Beatles) hearing them on acetate, though one suspects even they didn't hear all 138 tracks, the music of '68 and '69 took a step away from studio trickery to a more organic sound (White Album, Get Back, Jumpin' Jack Flash, Wild Honey etc.).
Yikes, I'm sounding like Mojo.
They're vital to The Beatles era.
This release is a landmark release.
How often has that happened in the last 30 years?
The stuff has been heard via official release (notwithstanding the 1975 overdubs) or bootleg is, like The White Album, all over the place, but, frankly, astounding.
Wings albums are...erm...Wings albums. Not bad (possibly), but not vital (definitely).
I'm not wildly sure if anyone even really needs a single CD of them.
I'm absolutely convinced they don't need box sets.
Their only use, I imagine, is to test the water out for the inevitable Beatles equivalent releases in ten years time.