Would you use a web-based email client where, with one login, you can access all 3 addresses? Not in an unified inbox, but have them as separates. Say the "cmd

Would you use a web-based email client where, with one login, you can access all 3 addresses? Not in an unified inbox, but have them as separates. Say the "cmd+1" keyboard shortcut is instantly switching to address #1, cmd +2 is switching to address #2 and so on...