100% Untrue. I use many extensions in Safari just like I use to in Chrome, my needs for customization are the same regardless the browser I use, but like many choose Safari for his performance, privacy ui, among other benefits. Find it very frustrating that many of the big products don't have Safari extensions. Often when I email there tech support they give a reason why, and then I try to explain there are referring to how extensions worked before, rather than how Safari extensions work now. So imagine a lot of companies don't know about the changes, or think they don't need to because they don't have enough people asking for them, but people probably did ask for them but were told it was not possible before, so they stopped asking.

The lack of Safari extensions is precisely the reason I don't use it. It seems like a great browser for Mac users otherwise.