Once you got red dot, you don't go back. Milling is superior and I've yet to find someone who regretted having their slide milled for a quality red dot.
That’s a valid point, Having just started down the RedDot rabbit hole, I’m trying to figure out getting the slide on my P-07 milled.. if I want/need BUIS on it, or just do something simple like just having a front sight installed, with no rear, hmmm, decisions,decisions.. The G17 MOS, that I bought pretty reasonably as a vehicle to try Red Dots on a handgun, convinced me that not only is this concept valid, but it’s very probably the way of the future.. I expect that in the near future (within the next 5 years or so,) that just about every manufacturer will offer pistols with factory milled slides for most of their product line, of course there will be exceptions, like a Beretta 92, Revolvers, etc. Frankly, I’m kinda surprised that CZ doesn’t already offer a P-07-09 with a slide already cut for a RDS, Who knows, maybe CZ will surprise all of us at SHOT.