Not really. The Glock 19 as it exists is not going anywhere. Sig sells a lot of their carry pistols, which have a similar compact slide on a full size grip, despite the availability of compact models. Also, The sig p320 compact is much closer in height to a glock 17 than a Glock 19. So another way to look at it is that Glock is able to offer a full size grip while giving up very little to "compact" sized competitors in the height department.