We get a few not infinite. with a Claude 5x Max subscription I get 3-5 workable parallel agents that themselves spawn subagents to complete work in a ~3 hour window before tokens are spent. I imagine with 20x Max that could be increased to maybe 10 within a 5 hour window? so if you want infinite you're also talking infinite money. Working in parallel takes me personally to a higher plane of output than that of a 10x engineer as it pertains to fulfilling requirements.