That is a somewhat useful analogy, but it can be taken too far. But it seems to me to be saying the same thing (though perhaps not as clearly) as the inkblot above:
Can you really count it? Not really!
I thought that when it said "At the beginning there is one blob, at the end there are two blobs" it was saying that the "worlds" did eventually become discrete, you just couldn't tell exactly when.
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?)