I think email is the ultimate form of bad skeumorphism. It was designed to mimic postal mail. Email addresses, no permissions, no true id checks, no punishment for abuse. Many of the now used features like spam folders, filters, encryption, receipts were just tacked on (poorly). And because it's a "worldwide standard" that no one controls it's impossible for someone with a vision to try and change email. I say abando…
And the cost in bandwidth and wasted time email and its spam problem impose on us cannot be understated. We really do need something new.