I think the general idea is, if you add a RDS, WML, extended mag, grip sleeve, threaded barrel & comp to your micro-9, is it still micro?
It kind of reminds me of when Cooper Mini released their Clubman station wagon. If your Cooper is the same size as a regular car, is it still Mini?
Also of how whenever phone companies release a new flagship model, their owners make a big deal about how it's 0.1mm thinner, then proceed to buy & carry them in big all-weather/submersible cases like Otterbox.
The Glock 43X & 48X MOS are very popular right now, b/c they have pic rails and are optic-ready. I've seen owners post photos of theirs w/ red dots & rail lights installed. By that point, I think, "You've pretty much negated the size advantages they have over a G19."