As seen in many threads here about which Gen is "best" and so forth, what one Glock owner thinks is the perfect Glock is the next guy's most hated Glock. By now, most people have found some combination of features they can tolerate the most with Gens 3, 4, and 5 (must like 9mm tho) all available to the public currently. It's hard for me to think that Glock will sustain producing all of these models, and if I had to say today what would eventually go away, it'd be Gen 4's, assuming that other calibers will make their way to Gen 5+ and since Gen 3 is needed for California. I'm personally a Gen 4 person, and I'll hate to see them go whenever that is. Whenever Glock is forced to think about releasing a new "Gen", why not consider a new modular line with a serialized chassis and a variety of frames in all sizes with combinations of different features...finger grooves, no grooves, undercuts, different stipple patterns, hump, no hump, etc. There could be a dozen frames to choose from in each size. After all, most people's gripes are the ergonomics first then usually the trigger. Glock can charge $100 a pop, and people can get the ergonomic configuration they want without going aftermarket or ruining their original frame. Base the frames and chassis off of Gen 4 design so that more than just 9mm can be accommodated. Glock would still produce the other Gens if one doesn't desire a modular package. I can't see them doing this though as they'd likely make less money not doing incremental releases that adds one little feature at a time while taking something away that will be re-added at a future date. Although their new approach could and would likely be initially releasing one or two frames, then every Shot Show you get one new frame for that year which a bunch of people will like and a bunch will hate and will have to wait till next year kinda like they do now. Who would be interested in this series for something different?