I'm the developer for Notebook 2018. A fan of the addon (yes, a fan! lol) directed my attention to this post.
At this point, ANY solution is welcome.
Opt-in only for "large" savedvars files strongly preferable. My addons savedvars are generally "small", but the content is only user hand-made, so
losses are terrible.
Also, when it is added, I wouldn't mind getting some notification with clear instructions / explanation. Be it a message here or an email as an addon developer.
It'll be a celebration!