As part of this I put my BSA through the same MOT as all my other bikes get, and it passed with flying colours. Yes, even the brakes, although there'll be more about that in the mag article.
The tester commented that most of the classics they get in for MOTs - let's say bikes between the current 1960 cut off and 1990 - are almost always in really good condition and rarely get more than an advisory, usually for something the owners knows about - tyres wearing down, and so on.
People look after old bikes, generally.
He's said he's happy to do non-MOT MOTs for older bikes for the same price as the proper MOT (some places treat it as a loss-leader to get work in) as a general annual inspection type of thing.
I think it makes sense to have someone else cast an eye over your bikes once a year, but removing the bureaucracy has to be a good thing.