I may be in the minority on this one, but I generally like the new Safari across iPad OS, iOS, and macOS. The tab interface isn't good on macOS or iPad OS, but the sidebar and tab groups that sync across devices is amazing. I'd like to see tabs moved to the sidebar as well!
Got my iPhone 13 Pro (Gold, 512GB) in the mail today. Happy to be off the Pro Max line. A fun experiment, but I definitely prefer the smaller size.