It's still worth trying and using. The developers consider it a "finished product" and I don't disagree. It does lots of small things well* that many browsers (even the self-confessed clones like Zen) don't do out of the box, if at all. Maybe in two years the browser will no longer be distributed or receive Chromium updates, but it exists and works fine now.

* For example, I get a lot of value from renaming my tabs and even replacing their favicons with emojis of my choice. Zen appears to have limited support for this.

It was popular but had no real route to profitability. Hence the acquisition.

I agree. I think Arc was the biggest innovation in browser UI since Chrome.

I think you will eventually have to switch because it will lack behind given that it's not their priority anymore. Zen browser seems like viable alternative but I haven't used it enough yet to know how well polished it is.

https://zen-browser.app

I mean, I guess that’s one way of looking at it. On the other hand, they did abandon the product, so you’ll have to switch anyway in time.