The last run of yield curve control came during a catastrophic world war where the Fed agreed to abandon rate independence to finance the fight against the Nazis. It was also a period with zero interest paid on reserves, where reserve requirements actually impacted bank lending, there was no private gold market, there was no Eurodollar market, the array of investing options were mostly limited to equities or bonds, and US bonds were not yet the collateral underpinning all global finance. When people talk about modern day YCC (not calling out Eliant specifically) I don't see much time spent addressing HOW it gets implemented, HOW govts actually enforce it with today's complex global plumbing, HOW they keep capital from leaking out of their jurisdictions into various other markets, HOW they manage Debt:GDP back down alongside that policy (which is the reason it would be done at all), or what catastrophe actually gives the air cover to make such a world altering policy change to global collateral. It would be a TECTONIC move likely requiring significant threat of economic pain the likes of which we've not seen in our lifetimes.(𝐓𝐗𝐌𝐂)