The Miswaak keeps your teeth clean. It's not really Islamic pseudoscience completely. But honestly, that's all it does. It doesn't have any added benefits v.s your over the counter tooth paste. In fact, I'd bet on the toothpaste over the Miswaak when it comes to my
I think miswak is useful, but when there's toothpaste, why go for miswak? There's this hadith The Prophet said, Whoever performs ablution should clean his nose with water by putting the water in it and then blowing it out, and whoever cleans his private parts with stones should do it with odd number of stones. (Sahih Bukhari 1.162, Sahih Bukhari 1.163)
Odd number of stonesto clean one's private part are for 7th century Arabia, now we use toilet rolls. Now that we have tooth paste, why choose miswak?
I don't think Prophet Muhammad intended to be so blindly followed, even if I dislike Muhammad. He did say, "Gather knowledge even if you have to go to China..." so he did value new knowledge.