A language feature alone doesn't replace an ecosystem with 25 years of production experience across platforms that aren't even supported by Go.

After getting generics, Go still needs to offer JFR/JMX/VisualVM like monitoring and dynamic code loading capabilities (Go plugins are very limited), JEE/Spring like Web tooling, Liferay/AEM/Magnolia like CMSs, an OS of its own and real time GC, card chips, M2M hardware gateways, printer enterprise configuration appps, and plenty of other use cases that many on HN seem unaware of its existence in enterprise scenarios.