That's an interesting point about the accessibility of digital tools. Without a completely new way to craft a sound nothing could sound all that different.
Although I do like "real" country music (sorry about the gatekeeping) "pop country", Nashville pop, or whatever you want to call it, is the one genre of music I dislike the whole of. I guess it's different from other country but it's similar enough to generic pop I wouldn't consider it new.
I do agree about rap/hip-hop though. The artists I listen to now are very different than what I listened to in the 90s and there is a much wider variety of style. I wonder how much of that is due to how easy it is to discover new artists now. Back in the 90s learning about underground rap artists, or underground anything, wasn't easy.
I didn't mean to suggest 90s rap was one-dimensional but it does seem like there is more variety now. But I wasn't in an environment where I could buy local/touring hip hop tapes out of the trunk of a car, where I was that sort of thing was mostly punk and metal, so I never experienced all there was to offer. Maybe what I perceive as an increase is just due to streaming services making discovery so much easier.