You can argue that real time settlement is something that we should have the technology to do now but this seems like just trying to pass the buck for poor company management
I don't even think it's fair to blame company management. I blame Congress and the SEC.
The regulations are not intended to cover something like this. They actually create, then quickly remove, the entire problem.
The short squeeze is what drives the price up, and the margin calls at the first decline are what reverse the rocket's momentum and send it hurtling inevitably to earth. Both of those outcomes are a direct result of present regulations - the boom and panic are both the result of the government telling a bunch of investors, at the same time, that they
must do something. This in turn sends a clear signal about immediate price direction, with funds flowing into the situation accordingly.
No sane trading house would keep the kind of funds on hand necessary to deal with a disruption of GME's scope proportionate to the size of their business. See: crisis, financial, 2008.
The clearinghouses are an antiquated parasite that the major trading houses tolerate because they represent both a barrier to entry (reserve requirements) and a degree of stability. Real-time settlement is great until someone introduces a virus that wipes all the records, and you have actors on both sides incentivized to misrepresent their records for profit. Decoupling trading and settlement records provides some insurance against that sort of attack.