I have understood this already several years ago - "indie" Android development is dead, without teams with thousands bucks for marketing.
And development of only special free corporate apps (and "tools") makes any sense, but Google Play as the store is not required for it.
And recent years i'm ready for any apps deletion by Google from Play account.
But it's also logical - old outdated apps that do not need any updates - do not bring money anymore for Google, so, why to store them
p.s. but the article author made tests after update very carelessly anyway...