Safety of Vanguard/Schwab/Fido

As I am now in retirement, I’m consolidating multiple accounts that I’ve accumulated over the years; 401K’s, 403b, IRA, etc. Makes everything simpler.
But this does mean I’ll end up with a large part of our assets at Vanguard. I know SIPC covers a variety of scenarios but just checking again how others here view having so much in one or two brokerages.
Thanks…

I had to face the same question last year. Long story short, it seems that if economic conditions become so uncertain that we’re worried about Vanguard/Fidelity/Schwab, it really won’t matter where our investments are held. See further here:
https://www.bogleheads.org/forum/viewtopic.php?p=8062214#p8062214