Yeah, for me Go is a specialized tool mostly for dealing with IO. The entire standard library and all of the builtin types are really designed for IO-centric applications which is why it's a natural fit for servers/microservices. Small, narrowly defined applications that mostly coordinate via sockets and serialization and it does those things really well.

In those worlds you're more likely to move data between logical units in JSON or Protobufs (both of which Go is good for) than to need proper generics so I don't understand the push from this subset of the community.

As far as container types and data structures, look at the number of well built storage solutions that don't seem encumbered by the lack of generics at all like: boltdb, bleve, BadgerDB, InfluxDB, etc.