This isn't good news at all. Nothing about it implies that when large incumbents imitate (or simply notice) something invented at a startup they won't patent it

This isn't good news at all. Nothing about it implies that when large incumbents imitate (or simply notice) something invented at a startup they won't patent it. This is a disadvantage for startups, because big companies will play this game. And it's a game backed by IP law so you can decide not to file, but you can't opt out.