I have started playing with the new Profiles in the latest Safari betas and it looks great. Took me a while get my head around what it’s doing. At first I thought it replaces tab groups but it does not. The main aspect appears to be the segregation. Best example is I can be logged into YouTube on one profile and not another. Great for separating work and personal stuff. I’ll keep experimenting and maybe write something longer. One note is that it is quite hidden and not necessarily discoverable even after you set it up.