Not countable many, but continuum many? Is that what you say?
Maybe - I'm not sure of what you mean by "continuum many" - you mean like real numbers? I was thinking more of something like "roughly countable, though the count will depend on which definition of "world" (or "blob") you use", or even better, "it doesn't really matter".
How many universes "branch off" from a "quantum event", and in how many of them is the cat dead vs alive, and what about non-50/50 scenarios, and please answer so that a physics dummy can maybe kind of understand?
(Is it just 1 with the live cat and 1 with the dead one?)