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But I will say, it's interesting that some devices, such as current smart phones, cram in a ton of highly miniaturized electronics, yet over ten years later none of the DSLRs on the market are down in size to match film SLRs. Well, I suppose some of the m43 cameras are quite small, but so were 110 cameras.
I don't think dedicated digital cameras are any smaller than the film models of yesteryear as film pretty much achieved the minimum size possible for use with human hands and eyes. I own a vintage Oly Pen from the 60s and it's a lot smaller than my Oly E-P3 4/3. They both have a 2X crop factor. I somehow have a vintage 90s ELFH, the ill-fated APS format just before the dawn of the digital era, and it's the smallest of all (smaller than my S90) and yet has a 1.25X crop factor.