Email doesn't suck – it's email clients that need improving
I'm sorry, but no, and as a mutt user myself:  email sucks.Spam.  The protocol is insecure.  Consolidation of major webmail providers is a huge problem on multiple fronts (censorship, third-party acceptance (of both delivery and non-GmailMicrosoftYahoo email accounts --- my Protonmail service can't talk to GetPocket's support email on Gmail for months, f'rex), spam, account hacking, authentication, repudiability (yes, that coin has two sides), workflow integrations, proprietary workflows, spam, account lockouts, lack of common email formatting and practice standards, HTML email, spam, pervasive surveillance, attachments, spam, mobile access, spam, spam, infinite diversity in proprietary messaging systems and platforms each fractally worse than email in a myrad ways, spam, spam, spam, inbox overflow, spam, spam, spam, spam, email bankruptcy.I've had an email account nearly continuously since the mid-1980s.  I've all but abandoned it in the past decade.There is no viable replacement on the horizon, though postal mail is looking increasingly attractive.