philosomatographer
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The reason people even care about expensive large format lenses is that the film actually does allow the extra Nth amount of quality to be extracted, where with smaller formats it would just be a waste of time. In other words, in LF, the lens is actually becomes your limiting factor, but the limit is still higher quality than smaller formats. If people applied the same standards and expectations to LF as they do smaller formats, the nicer LF lenses probably wouldn't even exist.
Hmm, I'm not so sure - I would make the exact opposite argument, that the lenses are much more of a limiting factor in smaller formats. Again, just from my personal experience.
This was shot wide open with the previously mentioned 1950s convertible symmar, with rather large camera movements applied, on Ilford Line Film (ISO 6, extraordinary resolution).

In my 16x20in print, the details in the in-focus areas are rendered with no visible sign of aberration whatsoever, i.e. 'perfect'. Every detail on, say, the light fitting, is rendered like it would be on a 5x7in print from a top lens on a Leica M3 (I know, I make small prints like that from my M3 + Heliar 50mm f/3.5 all the time).
If this is being "limited by the lens" than I don't know... Ah wait, I found a better example (same scrappy 1950s lens), but this time a smaller (8x10in) scanned print I made:

and a crop:

I sure am glad to be limited by lenses like these


I can understand that an enlarging lens would not have good performance at infinity, but all normal-purpose LF lenses are way better than what even dedicated photographers can extract from them. I am not a pro, but I feel comfortable that I kinda' know what I am doing, and I have never been able to fault the two junk 1950s lenses I have used on large format.
My modern APO- Schneider and Nikkor lenses only have better coatings (flare-resistance), that's it. Really, don't fall into the "Leica" trap, and buy expensive LF lenses because they're "better on paper". Almost all LF lenses are better than almost all photographers. This is a completely different game.