I feel like you have animosity towards building a billet lower from scratch. Either that or I misread and its towards the positive press this is garnering. If its against the DIY creation, why? Its not too much more expensive (barring your time is worth $0) than any other billet lower, registration is unnecessary, significant customization and improvements can be made without paying extra and its really more of a hobby than anything else. I think the same argument can be made against billet lowers with even more validity, at least DIY ones have more positives. The issue it raises is the ease of which that can be produced. Currently you need to have some skill or determination (even laminate firearms take a significant amount of time investment to create). With these, all you would have to do is push a button and walk away; no set-up block, micrometers, knowledge or dedication.