Cam help

Cost, complexity, durability. Just because you can do it on a small scale does make it production worthy.

Plus, when you add all the above together and look at the benefit it can’t be a push.

If you did all that and spent all the money and you end up with the same (or worse) emissions or/and the power increase isn’t there then you just don’t do it.

For decades they’ve been doing pneumatic valve control is some sanctioning bodies. I know one reason why it hasn’t shown up in mass surface transportation is that the rpm needed to see any gain is so high it’s just useless.

That’s not poo pooing anything. That’s understanding what matters. Some guys have no clue (not you RRR).
Yeah, it's easy to see the complexity. I saw it first hand. The conventional camshaft is just way easier for production, it lasts virtually forever as long as it's well lubricated and it's CHEAP to produce.