Engineers are running 8 instances of Claude Code at once. That doesn't mean they are completing work 8x faster.
If you must hold the context for 8 agents in your head at once, your expertise as an engineer is wasted.
See https://emsh.cat/one-human-one-agent-one-browser/ - One man + one agent in 72 hours, did better than thousands of agents over weeks.
Staying focused on one or two important tasks still works. You won't fall behind.