I have heard similarly from various outlets that "we'll just have to learn to live with Covid-19, like we do with the flu and other viruses that we're unable to eradicate".

What I find curious is that SARS-CoV-1 (e.g. the original SARS circa 2003) seemed to eventually disappear overnight. It leaves me pondering two questions:

1. Did SARS-CoV-1 actually disappear or do we just not hear about it anymore?

2. What is different between SARS-CoV-1 and SARS-CoV-2 that makes us think the latter will persist indefinitely when the former seemed to disappear?