FWIW I was 16+ years in the RHS of a LH type before command, and given BA's route network I certainly didn't find it "horrible", there were worse places to be - but it's whatever floats your boat I guess.....
I can see why you interpreted my comment that way; it's not really what I meant though. I didn't mean to suggest that 18+ years in the RHS of a BA aircraft would be horrible - nevertheless I think most people would regard 18+ years wait for command at any airline as highly undesirable. The fact it would mean that, for example, a late 30's joiner might never even get a LH command is, arguably, verging on 'horrible', however you choose to interpret that comment...