This is a good list, but under alternatives to Gmail, only tuta mail is listed. I know you should market your own product, but a list of other alternatives would make for a better, less subjective piece.
I'm a big fan of easymail.
Also I am disappointed that so many tech companies aim their products at techies. Where is email for actors, task management for zoo keepers?
Tuta is absolute dogshit, don't waste your time with their mail/contacts/calendar.