As others have noted it's not embezzlement/commingling and given the scenario "Wire out from SVB corp account to personal, document exact amount, and wire back to corp $NEWBANK a week/days later, document again" would hardly cause any heartburn now or down the road. Many would see it as responsible, proactive, and heroic.
Depending on the amount the only issue would likely come from your personal bank - I know of people with ~$10m at SVB and I have to imagine all of sudden wiring those kinds of funds to a personal account with an average daily balance that's a fraction of that would raise some alarms on the personal account - or maybe not as I can imagine the big big banks (BoA, etc) probably saw a lot of this on Thursday...
My startup has about $25k in SVB - but we don't have payroll and I have personal access to that without impacting me if push came to shove (paying contractors, etc). I was aware of the situation and probably could have gotten the funds out but I knew we were well below the FDIC threshold and just didn't want to bother with it (frankly). I would have had more anxiety executing the wire and waiting for it to show up on the other side...
Speaking personally I'm actually kind of curious to see what the FDIC process looks like - in the grand scheme of things it makes you part of a relatively small club! While I know people are suffering and the situation is a lot worse for many I'm actually looking forward to telling the story when appropriate.
The general population is already fascinated by startups and I've had more than a few "civilian" friends reach out to me asking about the SVB situation. When I tell them we're kind of impacted but not really they just kind of chalk it up to another "Wow, startup life is so wild even THE BANK failed".
Additionally I'd say the same - through various startups I've worked with SVB for over 15 years and the people have always been great (systems not so much).
(I am pretty confident there will be at least 250k + 50% advance-dividend early this week, and still optimistic but far from certain that a buyer will take the whole thing and it will be 100%. Last time people actually took losses of 50% above the FDIC amount (100k at the time) was 2008 (IndyMac).)
If documented its no problem and not uncommon at all in Germany.
In fact many business owners pay something like credit card bills personally and reimburse through the company later.
What is weird/scary (especially when not documented clearly and in advance) is moving your entire bank balance into a personal account. Aside from government/tax/legal, you'd have your investors (in a venture/angel backed company) to justify it to. It's justifiable in this truly exceptional case of SVB imploding and no other bank account being available. (It gets harder to justify in a larger company with lots of investors and more money involved; moving a $100mm balance in a company where you were down to 10% ownership to a personal account even in this situation would be weird AF and depending on the banks involved might cause you problems. I probably still would have emailed counsel and investors/etc. on thursday morning to ask what to do; likely would have sent it to lawyers to handle actually in the huge-account situation.)
Now you've got a weird thing to explain and no vindication.
Generally the law handles this through the "reasonable man" standard; i.e. "would a reasonable man, knowing what you did at the time, have done what you did?" This would allow you to shoot someone in self-defense who was holding a realistic looking toy gun at a child (which you believed to be a real gun, unlawful intent, etc. at the time).
I’m comfortable doing exactly as GP described to make payroll.