It shocks me how many people hold jazz musicians on a pedestal for simply being jazz. It's a lot more difficult and complex than pop and rock, but that's about it. Compared to the prog genres for example, it's about the same... but I don't know about Tech Death. Sure they play in 6/4, swing, and 7th chords, but it's nothing outstanding I think. They do not deserve all the attention they get. Now, let me introduce you to some very complex music:
Blotted Science- Synaptic Plasticity
This is a very interesting one. The time signature changes just about every measure.
Cannibal Corpse- Frantic Disembowelment
Their left hands tell the whole story.
Symphony X-Sea of Lies
More chop hell, as well as some playing with time signatures. I believe the beginning is in 5/4, but there's many breaks with odd things going on, I can never tell.
So, those are just a couple examples. I could have also have posted some Rush or Dream Theater song that anyone would have a field day with, but everyone's already heard those. Don't get me wrong though, jazz musicians are great, but I don't think it's the most difficult genre.
Flashy yes. Jazz isn't about flashy, it's about improvisation. It's the art of coming up with lyrical lines and innovative ways to improvise an existing melody. Virtuosity is only a means to achieve this, not an end goal.
Thanks for the vids though. They've got chops for sure.

