Also this submission title is both editorialized, contrary to the HN guidelines, and inaccurate, because the Browser Company is neither shutting down nor open sourcing Arc.
You had no way to know anything about this browser unless it was by word-of-mouth, not to mention the invite system. I don't think "asking to change browsers is a big ask" at all, otherwise you might as well just shut down the company right now.
Honestly the reasons laid out + the novelty of a new "AI Browser" makes me have a very negative future outlook on The Browser Company.