I vary it up. Some of the usual stuff done in our system and some more-contemporary dynamic work. I often vary it by class: a couple of traditional classes, a couple of "unique, newer stuff" ones. However, our "traditional" is quite good; it includes some dynamic work, and the static work is often held for cycles of not even 10 seconds, say in series of repeating, alternating sides 8 counts. So, it's half dynamic, I suppose. It's less based on long standing tradition, I think, than on what our Korean Great Grand Master found useful in his career, which included military and competition activity.
I tend to think that as long as nothing is done to a degree that it might injure (more so for beginners or hard driving younger brown belts -- or the psychological equivalent in arts with no belts LOL) it's all good. It all has some value, and can be supplemented.
Even the static stretching is OK, I think. The main downside of the static is any effect on, say, fast action immediately following in competition. In class, it could be saved for the end of class as a cool down of sorts, but it works OK on the front end; I make sure people are warm first, or emphasize to not push it; then, doing it in shorter time cycles almost makes it dynamic, anyway.
So, it's al good in the hood. Those of us in more traditional arts are in them at least partly for that tradition. (Granted, even a newer MMA school/system may, in essence, develop its own traditions, but you know what I mean). Do the "traditional" stuff, just do it smartly (eg, not at extreme ranges), and supplement as needed.
EDIT: BTW, this post may constitute what seems to have become my bimonthly JP check in. lol
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