Despite the popularity of startup accelerators, 99% fail to meet expectations due to a lack of effective mentorship and experience among their founders. Successful accelerators like Y Combinator thrive because their leaders possess firsthand knowledge of building billion-dollar companies, which is often missing in most programs. The distinction between true accelerators and startup schools is crucial for understanding their impact on startups.

Astra, a startup aimed at automating tasks for account executives with AI, has shut down just four months after securing funding due to co-founder tensions, slow enterprise sales cycles, and market confusion. Despite initial traction with two enterprise clients, the misalignment between founders and the challenges of lengthy sales processes ultimately led to its demise.