In the other browser that a lot of people use (Lol) is possible to create different profiles with whole different experiences. For example I can create one Opera Config for Work with different e-mail, shortcuts, etc and also one for personal more focused in entertainment.

I used to like this feature a lot because it makes one e-mail the main account for everything you do, every site you enter. It saves a lot of time because my work e-mail is used for a lot of sites and logins and my personal e-mail for others.

So when you can't separate things like that, a lot of times you have to switch between e-mails and with that it makes you login again and again. It's very annoying and that feature would save a lot of time and energy.