I want to use an alias, so two or more persons can share one address. Commonly used with info@ or mail@ prefixes. If I have an extra account, I can’t share it with others except using an alias again or run in troubles with emails marked as read flags, because everybody has his own account structur, behavior, e.g. time to read or delete mails etc. So none of my problems would be solved, they would expanse.
Neither are rules the best solution, because they are complex (I have a lot of them) and limited in recognizing and managing eml attachments.
The best, most elgant, easiest solution would be to give aliases it’s own auto bcc as in my opinion the feature makes most sense with aliases, not with accounts.