Plug and play machines are needed, but we need more engineers making them. You need CNC to make CNC and you need to know what you are doing.

Average bod arrives on the CNC scene, realises it is much cheaper to build-your-own so he designs a bare 3 axis CNC gantry assuming the wiring, switches, drivers and software can come later, how hard can it be? He then posts it on a forum expecting Wow's and adulation but instead gets told where he's gone wrong. He then fights his corner, tries to justify it, builds it anyway and comes back when he finds Mach 3 can't fix his mistakes.

His big problem is there are a lot more like him and the old saying holds true, "You can't sell people what they need, you have to sell them what they want". The parts market is aimed at him and caters for all the mistakes he is about to make. Basically, the newbs control the market due to their buying power. It is very easy to buy what newbs want and tricky to buy what is actually needed.

A newb machine is always made from aluminium extrusion, has a million rpm motor built in to the spindle, 6" of vertical where 2" would do, enormous stepper motors on all 3 axes, 2 on the X, not a diagonal brace in sight, round rails, and very little end support on the screws which are usually a joke.