I love what Opera has become over the years. Very slick and attractive. It's also very responsive, unlike Arc. To me Arc is the only other viable option for a browser on the MacOS because it has a share feature identical to Safari. I realise the developers are going for a universal code base, so not sure if this is even worth their effort, but I am sure there are more users like me who use this feature every day. Apple Notes and Apple Reminders being the most useful.