One of the only reasons I still have Google Chrome and Mozilla Firefox are because some extensions are simply not available for Safari on macOS. I’ve noticed this when reading blogs, as well – many extensions are designed for Chrome and/or Firefox but not Safari. Although Safari is a clean, fast browser that works well across Apple devices, this is a big drawback for many users.
Unless Chrome or Firefox adopt some killer features that Safari doesn’t have, I’ll likely stick with Safari for the time being. The ability to use Handoff between my MacBook Pro, iPad Air 2, and iPhone 7 Plus is the feature that keeps me coming back for more.