There may be more similarity in how pop recordings and even most recordings in general are produced these days, especially if the target is radio play, but they still do not all sound the same. That’s just another untrue extreme generalization.
Some are done much better than others and there are many differences.
So yes the dynamics may all have more similar characteristics than in the past but some are still done really poorly, others quite well, and everything in between.
No doubt the actual content of pop music these days is very similar in a desperate attempt to appeal to a broader and more diverse audience than in the past as are the cookie cutter "artists" that perform them.
Some are done much better than others and there are many differences.
So yes the dynamics may all have more similar characteristics than in the past but some are still done really poorly, others quite well, and everything in between.
No doubt the actual content of pop music these days is very similar in a desperate attempt to appeal to a broader and more diverse audience than in the past as are the cookie cutter "artists" that perform them.