I can tell you that I've put just north of 20,000 rounds downrange through Gen5 G17 pistols with Apex triggers and trigger bars in them with absolutely no change in the behaviors of the pistols.
I think we are in the process of discovering that the Gen5 Glock pistols have some issues that Glock hasn't fully worked out yet. They look like older Glocks, but in reality they are a completely new product and there are going to be some issues.
Typical to Glocks, however, the issues are really quiet because people don't talk about them. And when they do get discussed, the issues are often dismissed in the moment only to be acknowledged much, much later. Today, for instance, lots of people will acknowledge that 3rd generation Glocks in .40 had boatloads of problems. During the time when they were happening, however, I lost track of how many names I was called for pointing out the issues I was encountering and that others like BeatTrash and Chuck Haggard (both stellar individuals who are honest to a fault) were reporting.
Glock is being more responsive and isn't threatening to sue anyone who reports issues (yes...they actually did that before), which are encouraging signs. That said, they aren't exactly being forthcoming about problems that they are recognizing either. As an example, I'd really like to get an updated locking block that resolves barrel support issues in the Gen5 guns. But there's no chance in hell Glock would even acknowledge the existence of such a thing even though I know for a fact it exists.
So some things never change...