I fear that in the long term the most impactful legacy of Biden will have been ending the COVID emergency. Once Trump was no longer in power a lot of people stopped treating COVID seriously, and now we're getting wave after wave of variants.
It is the case that the post-Omicron strains don't destroy the lungs not kill people as much, but they still seem to cause damage to the immune system, the central nervous system and the brain. And the damage is cumulative with repeat COVID infections.
Here's a doctor discussing the brain damage. We have all heard about brain fog and lower IQ, but here he's arguing that cumulative COVID infections will also lower empathy.
This seems rather disastrous. And we didn't deal with it adequately. The mRNA vaccines sold in the USA are of low quality, and we never had a proper comparative study of other vaccines from Russia, China, Cuba, Turkey, etc. There is no national ventilation policy, we should be installing HEP-UV filters in every classroom, daycare, church room, airport, shopping mall, and corporate meeting room in the country, encouraging open windows, etc. We're not. The CDC is telling people to wash their hands even though COVID is airborne. Covid tests are not subsidized and cost $20/each. Biden is bragging that people are going to the office even when they're sick.
What I suspect will happen is that people will keep accumulating infections, even one a year, and gradually lose their immune systems, IQ, and empathy. We're seeing a rise in shingles, and soon we may see a rise in cancers.