COBRA seems useless af. Often better to just get a personal plan.
(Source: was on COBRA for the past 18 months, was annoyed that it ran out. Equivalent plans on my ACA exchange cost significantly more.)
I suspect for the average American the math goes the other way.
Source: Tried COBRA many times in the past decade (lots of startups) and it was never worth it. I wish health insurance wasn't tied to employers at all.