Isn't this claim somewhat refuted by the very article you are posting against? There are other comments in this thread that explain why this doesn't make any sense eg pilif's above[1]
They both have detection rates in the high 90s, which is considered excellent, in general, and certainly so for a no-cost product. MSE only just edged out Avast.
The comment you listed cites nothing, not sure why its so authoritative to you. All software has vulnerabilities, but where's the big attack on AV? What CVEs are we seeing in the wild, if any?
Isn't this claim somewhat refuted by the very article you are posting against? There are other comments in this thread that explain why this doesn't make any sense eg pilif's above[1]
[1] https://news.ycombinator.com/item?id=11058688