I am still using Arc as my daily browser even I know it is dying.
Arc Browser, for me, is the browser done right. It has all the UX details make browsing productive and satisfying. It is just very sad the browser company does not open source it.
At least at the last time I check, Zen still does not have all those subtleties.
I beleive there will be people build better UI for the coming ladybird browser, and please borrow from Arc.