Archegos just a warning of things to come

Archegos just a warning of things to come, and it will be ignored! But how many Risk managers are preparing their business for a 1987-style market 'surprise', i.e. a near-instant 25%+ move in prices? Are the clearing houses, prime brokers, margin clerks really set up for this type of 'black swan' event? Markets are much bigger then in 1987 when bond issues of 1 billion were the rare exception and the derivatives market was in its infancy. And we don't even want to think of the break-up of the Euro (my suggestion - if you hold any Euros make sure you are not left 'naked' when it happens).