For anyone who didn’t click on that link: this is about the device having the same physical security as the thing it want to replace (paper). That is if someone has access to it, they can read it.

It is not about the device having some known software vulnerabilities in the usual sense when we hear about network-connected insecure device

Lack of full device encryption is also a no-go for me.

I can’t imagine loosing such device that contains confidential data.

The difference between this and a piece of paper is that this could contain your whole stack/library. Not just a single piece of paper note.

Also someone is way more likely to steal some iPad-looking thing than a paper notebook

Surely it replaces a briefcase, or a filing cabinet, that stores lots of documents/files/folders. Those things have locks.

Unofficial gocryptfs based home directory encryption is available; https://github.com/RedTeamPentesting/remarkable-encryption

The software is also very limited as it is... too bad they dont make it possible for a marketplace or extensions to exist officially on the device...

Remarkable is meant to hold all your notes, books, any such textual data. Ebooks are only one small part of its intended usage.

I know. The question stands.

I don't think so.

What does a book e-reader have to do with the ReMarkable though? Why does that question still matter?

No, but many ereaders at least provide a pin code lock which the rm2 does not.