> we've been penalizing almost every coronavirus story
Only you know the actual volume of coronavirus-related stories, and whether leaving them as-is would cover the entire top 10, entire first page, or entire first 3 pages.
However IMO the adjustment, or "penalization," being applied seems too severe. CV is obviously the most important news topic in the world right now, the situation changes extremely rapidly, making the comments section, with contributors from around the globe, highly relevant and informative. My opinion is that up-to-date CV-related content on HN has been difficult to find, and the lack of such, in favor of random, often whimsical topics, trivializes HN.
As I write this, the only CV-connected stories on page 1 are at #19: "Chloroquine, past and present" and at #28: "State projections for Covid-19." While its understandable not wanting HN to be totally dominated by CV, I think there is a better balance to be had.