SARS-CoV-1 and SARS-CoV-2 seem very similar in terms of their nature and the way in which they entered the human population. SARS-CoV-1 appears to have been driven to extinction, but SARS-CoV-2, which causes covid-19, has only been successfully eradicated on islands like New Zealand and Taiwan.
Just from reading Wikipedia articles, I'm getting the impression that SARS-CoV-1 was relatively easy to eradicate, whereas SARS-CoV-2 will probably be endemic forever unless there is a vaccine that produces strong and long-lived immunity. Why the difference? Was SARS-CoV-1 not as easily spread by asymptomatic carriers? Did it have a lower R0? Or were we just lucky to have been able to nip it in the bud?