One way I've seen personally is that folks are using tools that drive many Claude Code sessions at once via something like git-worktree as a way of multitasking in a single codebase. Even with garden-variety model use, these folks are hitting the existing 5-hourly rate limits routinely.

I use this approach because I like to work on features or logical components in isolation and then bring them together. I still can't limit out most of the time because I need to actually look at the outputs and think about what I'm building. At the moment I have 3 directories in my work tree. Sometimes I prompt in more than one at a time, especially at interfacing code, but that could mean 30–90 minutes of reviewing and implementing things in each directory. Over a work day I apparently send an average of ~40 messages according to `claude --resume`