Dont you think it will loss more time than using a single email? Also you may receive an important message which you have to check instantly amd you could do that buy you will not be able to do that as yoi are not using that as a main account and it may cause you a big loss.
I am not entirely sure. I mean yes single email is faster that part is obvious and undisputed, but do you really want that much spam in your business mail? Plus the pace problem is not something that I worry about that much, I just logout and log back in quickly, my mail and password is saved in my browser so it takes maybe 15 seconds to log out and log back in with the new one and doesn't really cause me to lose too much time. I do not remember a single instance where I had to check my mail faster than a few minutes.
So, I would say it doesn't have that much problem. I could drop it to 2 emails, one business and one for everything else, the business one needs to stay because I do not register it anywhere, only give it to people I work with and they email me there directly so it never receives any spam. Rest could be merged but I rather keep my "fun" reason registration and my money reasons different, such as personal netflix or spotify or whatever with casinos and all that, these are all fun, but the exchanges and so forth that is serious needs to be separate for me.