Sure, this can be an inconvenience when you type a lot and use a single-display setup. But I read way more and consider single-monitor work resemble running on crutches. This said I would probably put an eInk and a classic display alongside each other to display what I have to read on one side and what I have to edit next to it.

Messenger apps even have separate panes for displaying message threads and for editing the message you are going to submit - I could put these on separate displays (if the apps would allow moving panels around the way classic desktop apps did).