I don't think I've ever /resumed a Claude Code session even once. What do people use that for? The way I use it is to make a change, maybe document the change, and then I'm done. New session.
I'd use it if I hit the 5 hour quota mid-change and then came back later in the day in a new terminal (depending on the input/output ratio of my now un-cached context, of course).
I have like 15 concurrent sessions I leave up for weeks, 50% Codex 50% Claude Code, even though I know they work better with fresh context. Then again I also always have least 200 browser tabs up. I probably just have a mental illness.