Have to agree with TheChunk - many people will have an interest in CNC, but lack of time / ££ / motivation / space restricts building and using these machines. For me anyway, lack of space is a problem; no garage, shed or loft means any machine would have to go in living quarters / bedroom. Being in an upstairs flat doesn't help either...

Other posts relating to "being able to contribute something useful" is also true. I personally come on occasionally mostly to see what's new on the site.

FWIW, and as a new-ish member my interest in CNC comes from previous employment in the engineering industry (trained as fitter / toolmaker, and trained in manual milling / turning), and I'll admit my interest is largely in "commercial" machinery (which is generally too big and clumsy for an average home user) and engineering in general.