I love my Gen 3 just the way it is bone stock with night sights. I had a genuine disdain for the Gen 4 and RTF finish. I was out with my wife at an LGS in the next town letting her fondle CCW pieces, for her upcoming CCP. She is gravitating to the G26, more and more.
We handled a G19 with RTF and a Gen 4 G17. The RTF is simply to aggressive and "prickly" It would wear a hole in your cover garment or your side eventually in quick order. The salesman said "som people are taking very fine grit sandpaper and smoothing that down." Whats the point of getting it then???
The G17 Gen 4 has a different grip surface than the Gen 3 but not NEARLY as aggressive or rough as the RTF, and would not be that bad to carry EDC. The changeable back straps have come a good ways. The first few I saw were ill fitting, and disappointed me in Glock. This one however, was almost un-noticeable except for the slight identation in the grip with apin to be punched out to take out the backstrap. I literally could not see where it and the rest of the grip joined. Very well done. I guess if I was forced to I could take a Gen 4. Glad Gaston is a stubborn bank mule and isnt ridding the Gen 3
They did have a Gen 3 G21SF with NS and a Picatinny rail for 749...that is why I refuse to buy anything from any shop charging more than cost lus 10%. Some LGS just like to hose people.