Book: The Complete Guide to Go Programming Also by me: Thinking in Go (2-book series) — Complete Guide to Go Programming + Hexagonal Architecture in Go My project: Hermes IDE | GitHub — an IDE for developers who ship with Claude Code and other AI coding tools Me: xgabriel.com | GitHub An engineer I know spent two days arguing with their team about a single type parameter. The function was a four-line Map over a slice. Half the team wanted to keep it generic, the other half wanted to write three concrete versions. Both sides cited "Go 1.18 generics" as if the language had not moved since 2022. It has moved a lot. Type inference widened across 1.21 and the releases that followed, and the call-site noise mostly went away. The 1.21 stdlib added slices , maps , and cmp.Ordered , which collapsed most of the boilerplate problem into a one-liner. Go 1.26 shipped errors.AsType , which finally killed the out-pointer dance.…