> Why are people accessing emails from the webUI. Email is SMTP and IMAP, use any number of clients to access your email.
Because the UX of most email clients is extremely bad when compared with the webui of these email providers.
Try Mailspring. I’m a huge fan: https://github.com/Foundry376/Mailspring
It's also IMAP is an awful protocol with so many glaring issues its impossible for a modern client to paper over them. Fastmail invented JMAP but it doesn't seem to have taken off with any other providers.