Ganking is doing just fine. Granted there are different names and faces out there now. Miniluv is still doing its thing even with Boney being on haitus(?) and CODE stepping down a bit with much more infrequent gank-a-thons in the Jita <-> Amarr pipe. If you pay attention to freighter kills on Zkill, you’ll see new names have stepped up and started freighter ganking.
We’ve seen some prominent figures in highsec ganking either get wrongfully banned or quit of their own choosing. As long as people fly freighters, there will always be ones that do so with excessive risk. All a pilot needs is the drive, knowledge, and resources to grab a piece of the pie.
Freighter ganking will always be a thing unless CCP makes it literally impossible. Waters can definitely be overfished, so when there is a slight lull or anything like it I always consider it to be good. Haulers gain new confidences and do stupid things that can be taken advantage of.