Yeah, there's also the benefits you get from longer exposures and the ability to swap lenses. I carry an Olympus 12-40mm f/2.8 and Panasonic 100-300mm f/4-5.6, which gives me a massive focal length range to play with in a relatively small package.
For a hobbyist like me M43 is great and won't be replaced by a cell phone any time soon. And as much as I'd like an A7iii I can't justify the extra cost and lens size for what I do.