Will people really need a bunch of different agents? Even using two codex session for different project make me feel a bit overwhelmed, or may be i just old

Same. I haven't been able to see how people let agent loops run without significant steering and produce good quality software. VS Code with one or two integrated terminals running is fine for me. Or a couple of VS Code instances if I'm working one a couple of projects concurrently. The advantage of VS Code is the code / diff visibility if you like to be hands on.

yeah I also don't really see a use case for me, like do ppl really run that many agents in parallel that they cannot comfortably multiplex them using just a terminal emulator