Now that I can do a lot with 3-6 AI agents running usefully 2-5min at a time to crank through my plans, the IDE is mostly just taking valuable space

For backend/application code, I find it's instead about focusing on the planning experience, managing multiple agents, and reviewing generated artifacts+PRs. File browsers, source viewers, REPLs, etc don't matter here (verbose, too zoomed-in, not reflecting agent activity, etc), or at best, I'll look at occasionally while the agents do their thing.