Yeah, I was just about to post something similar as you Steve, but you did it far better than I could ever do.
Over the years people seem to have bought into the stickers and made up genres, and while I do think they have their usage when we're talking music on the forum and we need an easy go-to description, sometimes they backfire on our behinds.
In regards to the op: have you ever heard Discipline? The album practically spawned the math rock scene some 20+ years before it's "conception". Discipline also quite neatly taps into the post punk/ no wave of the early 80s, albeit conveyed in a far more esoteric dressing. Some of it is almost ambient, while other parts are downright snarling and heavy. Is it electronic at heart then? The electronic percussion Bruford experimented with does suggest that, but then again we also get fed big fat guitar riffs, melodic tunes akin to pop ballads, and something like The Sheltering Sky that defies just about any sticker you care to throw at it.
Oh and don't even get me started on Thrak and The ConstruKction of Light....
Lastly, why is this thread posted in general music discussions? I mean, surely we can agree on Fripp and his endless noodling cohorts can be described as a prog proper act eh?