Remember when Zoom claimed that meetings were E2EE yet you could join the meeting by phone and no one batted an eye for at least one or two years? Noticed how no regular person cares when the "security code" of a chat partner changes in WhatsApp or Signal? Not to mention no regular person uses self-compiled apps for that, even if it were possible. E2EE is close to becoming a cargo cult, because done properly key management and identity verification are a usability nightmare. It will always remain a toy for a niche audience. Most people just don't care, and the non-technical people that do care are happy with a green lock appearing somewhere. I do hope to be proven wrong, though.