I’ve been collecting mics for years and have a huge collection now. Dirt cheap through to stupid, and I review lots of them. Looking back, while a few immediately attract an easily understood ‘label’, the majority sound exactly like you imagine. Very few surprises. Putting just a few into the awful category dump bin, the rest fit very neatly into categories. Dark, bright, flattering, revealing, multi-purpose or single purpose. The boring bit is nothing new has appeared for a while. The only different mic I bought was the Shure nexadyne, thinking it would replace the 58. It didn’t, and was three times what the 58 cost.
Best comparison is that it is like looking at your kitchen spice bottles. The ones you use every day. Maybe three out of a cupboard full. Then you replace the popular one with a different brand and it’s nearly the same. But by the time you finish the food, you can’t remember which one was best. Mics really are like that. In my studio is a wired in and connected 57 and an AKG 414. Every recording in the past three weeks has used one of them. Four weeks again the 57 was a 58. I probably have over a hundred mics, and I cannot be bothered to go to the store, move a few modes and pick something different. 2 mics for everyday recording. It’s stupid. Probably I do have something better/nicer/more suitable somewhere, but the fifteen minutes to find it, connect it and discard it are just pointless when there is EQ.