So, banks were very vulnerable on the one hand due to over leverage, and they all owned a lot of an asset class that became unpriceable once people realized what had happened.
There is nothing like that now. The big issue is unrealized losses on 2020-1 vintage Treasury and government-mortgage securities because of rising rates. The Fed backstopped that by letting banks borrow against the full value of the bonds, not the depreciated value. If those bonds go to expiration, they are paid back in full, and the unrealized losses never become realized.
This is a tempest in a teapot caused by a few babies on Sand Hill Road who decided to destroy SVB, and then whine all weekend to the government to save them. They are libertarians until it hurts the bottom line.