For sure. I have to do cardio for my mood as well. I never want to get to a point where I can’t at least slowly jog a few miles, would be a miserable quality of life. I also really like air/fan bikes and use them a lot as well. For the dynamic training, if someone is progressing with linear training, then by all means stick with it. When you stop making progress and plateau (especially as a novice or advanced) you have to come up with something new. Whether it’s shifting the split, adding deload weeks, dynamic training, maybe even the diet. To me it’s a technique to possibly help get more weight on the bar. If not, I move on to something new.