Even WAMU (a huge FDIC action) was done after banking hours closed on the west coast. https://en.wikipedia.org/wiki/Washington_Mutual
I would surmise that the news spread fast among the tech demographic the bank services and the run is really bad.
We don't know the timeline here, but speculating that "it must be bad" because things didn't happen overnight isn't really responsible.
If so, then the difference doesn't imply much about the banks asset level, just the idiocy of its bosses.
A lot of folks (like the top of thread) want to suggest that because it didn't play out like the 60 minutes story, it must mean something significant. That story barely touched on the weeks of leg-work the FDIC did for that particular bank, for example. If you weren't paying close attention, you'd miss it.
This arrangement usually results in all depositors being made whole, and the FDIC fund not taking any, or many, actually losses, because most of the loans will still pay back, at least partially
They also do this before seizing the bank, so that it's all very orderly and calms any panics
SVB was looking for a buyer on the open market and that failed--no surprise
That the FDIC also could not find a buyer that they could subsidize and announce the same day as the seizure is very damning. I would be shocked if someone comes in later and tries to buy it
Also, the fact the seizure happened in the middle of the business day, and not at the close of business yesterday points to a somewhat disorderly and rapidly deteriorating condition. I think maybe the run picked up a lot faster than they expected