I'm curious too, because there is a help page[1] linked in the FAQ that appears to be completely blank!
[1] https://support.remarkable.com/s/article/Using-reMarkable-wi...
[1] https://support.remarkable.com/s/article/Using-reMarkable-wi...
please note that no subscription != no cloud. of the features listed in the help page all but "tags" require an remarkable cloud account and may stop working if remarkable cloud ever shuts down.