One thing people seem to miss is that this isn't just an America thing... the shortages are global. This wasn't caused by people getting tax credits and extra cash in the USA. We are seeing the effect of a world wide supply chain interruption coupled with a huge amount of pent-up demand.
I remember having the conversation with my dad last Spring (a few months before he passed away) about how things were going to go nuts as we start to move out of the pandemic. The supply shock happened over 6-12 months (supply chain interruptions usually have a lagging effect), but then it was coupled with a demand shock from pent up demand and changing consumer spending (less on travel and more on home improvement and hobbies). Some of it was predictable (cars), but no one could have predicted that the collectibles market would sky rocket.
This stuff will be studied for the next 100 years.