This is a good...

This is a good read

http://elsa.berkeley.edu/~eichengr/research/tawney_lecture2apr29-05.pdf


"In 1913, the liquid sterling
claims held by official foreign institutions were 2 ½ times the Bank of England’s gold
reserves..."

Debasement

While as you say . . . the US took everything, and after WW1 they maintained convertability of their dollar into gold. England didn't. It couldn't.

Also, as you say, the US today is different to what it was. Like all reserve currencies it's currency starts on sound footing. Then for multitudinous reasons - ie, super power over strecth (Rome then, US now) it currency gets debased.

Once the currency is debased, loosing reserve status will follow.

The US dollar will loose reserve status. It's just a matter of when.

I ain't no China-lover or US-hater, but the CCP has many years ahead of it leading China.