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MERS has a case fatality rate of >40% and an R0 of ~0.4
SARS has a case fatality rate of 10% and an R0 of ~2.2At an estimated R0 of 1.8 an CSR of 1% this is somewhere near Cholera on this graph.
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Yeah I don't know how similar they are, certainly different in fatality and contagiousness, but seem somewhat similar as viruses looking at these for example https://www.niaid.nih.gov/diseases-conditions/covid-19
https://www.who.int/health-topics/coronavirus
SARS and MERS were apparently somewhat similar coronaviruses too. So even if you'd be immune to this, the next version of the virus is probably just different enough. But apparently herd immunity is the way to get through this pandemia indeed.