It’s also never adjusted for inflation, despite this mess in theory being triggered by raising of interest rates due to super high inflation. 250K when it was set in 2010 is the equivalent of almost $350K now. If we ignore that, then we’re just admitting the number is totally arbitrary and we shouldn’t even bother arguing whether it’s a lot or a little.
Separately, it’s weird that a joint account is insured to 500K but a business account stays at 250K. It actually does weirdly favor wealthy individuals vs. working capital accounts for businesses that might represent many employees.