I have a Gen3 17 & 19, a Gen4 21 and a 19x. I can live with the finger grooves on the 17 & 21, since there is more room between the top groove and the bottom of the trigger guard, to prevent dreaded “G-Knuckle”. But the finger grooves work not so well for me on the Gen3 19, and I’m now seriously considering taking the finger grooves off this one, since there is no way I’d give this one up.
The 19x convinced me that I could live without the finger grooves from here on out, and we never really needed them to begin with.