Thank you. I hadn’t realised it was already seen to be controversial.
Interesting (to me) that he runs through some of the arguments — and arrives at precisely the opposite conclusion. The one he doesn’t mention (as I found — and as Philipy suggests) is that passenger vehicles, let alone a whole train of them, just look empty if you don’t put a few seated figures in the windows — and in this case, it seems to me, it doesn’t matter at all that they’re ‘static’. As Peter says (and I can illustrate) an obvious lack of crew on moving locomotives doesn’t look wonderful either.
I haven’t done a particularly accomplished job painting the cheapo Preiser clones in dull, much simplified colour (largely) — but I have to say the overall effect is still much better than I’d expected.