If you've got the Alexa integration installed then the latest update causes the reboot. You might be able to disable it as it's coming up and then downgrade it to one that works

Are there major limitations of using a computer monitor as a TV if I plug another device into it (eg Apple TV) apart from the screen size?

I feel this would be a good way to go for small cheap TVs at least.

Now this looks promising. Thanks very much. I'll give it a go.

The only advantage of Evernote over everything else is it's scanning of the contents of PDFs. I scan all my paper documents and stored them in Evernote for easy searching. Since I moved away from Evernote (to Joplin) that's the only thing I missed. If anyone has a suggestion for replacing this I'd be very happy.

Thanks to your comment I took the time to read it. I was put off at first by the wall of text but went back and gave it a go.

Glad I did.