Glock also says that the gen 5 guns blow the old pistols out of the water in long term reliability. According to them, the new guns are by far the most reliable they have ever made. So for me, the gen 3 was the gold standard legendary pistol, the gen 4 was mehhhh, and the gen 5 blows them out of the water.
The caveat to the Gen5 is it all good if you like it and if you are only seeking 9MM. Unless something has been changed since it was released with the Gen5 changes in the locking block,
it cannot be used in higher pressure calibers. All of my Gen4 pistols are from 2016 and forward and have been nothing but reliable with two of them now pushing 12K in rounds down range. It will be interesting to see how the Gen5 fares, then again, what pistol from Glock has not ever paid for itself--for the company or the user?