Understood. Saying "old" is an invalid argument, even among people who are supposed to understand the context. But comparing IMAP to Earth is very valid. It's a marvel of rational thought. You must be very popular.

Everyone who uses IMAP knows its weaknesses. I'm not going to write a book here. It's very, very slow; it has bizarre choices - I still don't understand why I need to delete my message, and then delete the deleted message; it doesn't support now commonplace modern features like tags; its push extension is so naive and resource taxing, companies just implement their own, even when otherwise trying to use IMAP.

But just being slow is an argument enough. I use a few email clients, only one client uses IMAP, and my stomach curls into a ball every time I open it, because I know it'll be synching forever. Even if IMAP being old is a poor argument, me getting old while waiting for it synching, sure is.