Off the top of my head: parallel subagents, hooks, skills, and a much better plan mode. These features enable way better steering than we had last year. Subagents are a huge boon to productivity.
CC has built in subagents (including at least one not listed) that work very well: https://code.claude.com/docs/en/sub-agents#built-in-subagent...
this was not the case in the past, I swore off subagents, but they got good at some point