Yes, but with a lot of preparation that goes into a modern dj set (analyzing tracks, setting beatgrids, looping, going crazy with the midi mapping, etc.) you kind of want to use your own gear. Don't you? It makes performing easier and more personal at the same time. The creative possibilities are endless really with that style of dj-ing. That is not to say that other styles are not relevant anymore. They are. It's just a different approach. That's all.

Like many, I learned to dj on Technics and CDJ's. I do think that it's a plus for any new dj to learn how to beatmatch manually. However, with today's technology it's not a requirement anymore. A good dj set is not about how well the beats are matched. It's never been about that. A good dj set is an experience for the crowd. A journey through music and different moods that the dj takes his/her audience on. To be honest, there are very few dj's who really understand that. Hence, millions of "cloned" dj's all over the place playing same tracks in the same order using same equipment.