it can't possibly keep up with the machines that consume gas if they've been speed-upgraded. (using large fluid storage as the holding tanks for gasses makes more sense than huge arrays of gas tanks. If we could get some dynamic gas-tanks that would be useful, but as of yet that isn't happening.

it might be improved by massively paralellizing the machines, but thats a bit overkill. Either upgraded versions or slots for upgrades would make sense, probably makes some sense to do this for the gas pipes as well.

in fact a lot of the gas/fluid related machines could use the ability to speed/power upgrade. The power demands on the electrolytic separators makes using multiple a bit of a bear

I agree. This is low-priority, but planned.

In the process of adding upgrades for these now.

Done!

is there a beta or release candidate for testing that contains this yet or is it code-only at the moment?

It's only in code at the moment - we're close to finished though now and planning to get v8 out in the next couple of weeks, I think