Well we know, based on this instagram post, that the adobe shoot was 4 weeks ago. Based on JPOP time, that was practically yesterday. That means that in the very recent past, the 3 "Nearly Finished" MG prototypes still had hot glue gun created test ramps. Even the wavy ramp we see in the video is clearly a hot-glue-gun test ramp. While those kinds of ramps are a great way to test out your ideas and easily make changes to them, that is a LONG way from pre-production vacuum-formed test ramps, and an even longer way from final manufacturing ramps. From the looks of it, most of the upper playfield stuff is not even close to pre-production stage.
JPOP technically can get foam-core test games flipping, so it doesn't mean much to say that he has a flipping white wood as far as where in the design process he is. I would say that those 3 MG prototypes look like they are probably somewhere right in the middle between a foamcore test layout and an honest to god preproduction game. Real printed wood test playfields and mechs on the base layer, still conceptual stage with all the upper playfield stuff, which is where most of the custom manufactured parts will come in. And who knows if the art is signed off as complete (I loved how Jeremy laughed when JPOP suggested he's the one who will just lock a piece of art as finalized when the tinkering goes on too long).
Unless he feels the need to flip a switch, quit dicking around, and start locking in designs with honest to god pre-pro test parts, I really wouldn't be surprised with another 2 years to get these things to production (I am assuming the previous 4 years had a lot of distractions with the aborted BHZA path). And I still have zero idea about how he plans to produce these things. I guarantee he isn't going to hang up his designer hat so he can put on his Factory Supervisor hat full time for the duration of the build.
Based on the substance of what we've seen in this drawn-out "On the rug" reveal, I am convinced that JPOP thought the lesson to be learned from "The Lebowski Effect" was that he merely needed better marketing. Despite the fact that the adobe video came months earlier than he wanted, it appears, from the enthusiastic response from a lot of his formally disgruntled customers, that he was right.