I think you really need to work out what you are wanting from the camera - is it the experience of taking the photo or the resulting image quality that is most important to you? The other benefits would be being able to use different focal lengths for example.
My personal journey in finding the right camera has encompassed quite a few styles of camera, and I would say that i'm happiest with medium format B&W images, since for me personally, the most joy is to be had from making a traditional wet print in my darkroom, and by far the easiest images for me to enlarge and medium format, since the lower enlargement needed to produce the image sizes I typically print (16*20) mean that I can get away with somewhat shoddy technique without it obviously impacting the resulting print.
I'm fine with different aspect ratios on medium format, and find that 645 is a compromise i'm happy with (probably because my target prints aren't large), so this is the route i've gone to take advantage of more modern cameras. I have a full set of Mamiya AFD camera and lenses covering 35mm up to 150mm (so that's 20mm to 100mm 35mm equivalent or something like that). In addition, I have a digital back for this system, which gives me amazing image quality and is what I use for colour with this system (i've got a fair bit of chrome in the freezer which although out of date is i'm pretty certain still fine - I should have a clear out!).
Now there are times I want larger medium format negatives, and I have hasselblad for 6x6 images, and this camera is actually smaller and lighter than the mamiya 645 if i'm out for a walk, so this tends to get used more with an 80mm lens.
If i want small and light digital, I use Fuji X, and I would certainly recommend this as a camera system if you want a small mirrorless digital system, since the lenses are great, and since the system has now been out for many years, there are plenty of decent second hand lenses and cameras to try out to see how you get on with it.
So, try and work out what you want from the camera, and see if you can optimise for this. At the end of the day, it's whether you end up with images you like that is the point, not which camera you use.
