Openhab 2 or 1 for production

What should one use for building control of a makerspace atm?

Use OH 1.7.1 for production.

OH 2 is still in alpha, undergoing massive changes, and not all bindings currently work. I wouldn’t recommend it unless you are wanting to test it and feed your experiences back to the community.

If you want to be closer to the bleeding edge, you can try the OH 1.8 Nightlies.