100% this. I got to ride in Vera, one of two airworthy Avro Lancasters, a few years ago, and I was shocked how small and cramped it was. The C-130 Hercules, far from the largest military transport today, feels luxurious and roomy by comparison. And that was the RAF's premier bomber, among the heaviest bomb loads.
And likewise, the comparison between a P-47 and a Bf 109 is not something you can really appreciate until you see them side by side. I would not have wanted to go to war in that cramped metal sarcophagus of a Messershmitt.
Two things about that. Firstly I agree inside they are tiny and having the clamber over the wing spar as a 6ft chunky man wasn't easy.
Some time ago I saw a photograph of an RAF Tornado on the ground next to a Lancaster and was shocked how big the modern aircraft are, especially compared to what was a heavy bomber. I can't find that photo, but this gives some idea.
https://c8.alamy.com/comp/P9CWD2/dambusters-617sqn-617-squad...