@jefito @C6REW I can't imagine any Damascene conversions to tags from folders on day 1, but you do need to experience EN's positives to trust it enough to abandon a comfortable idea. Getting a critical volume of existing data in there must be a significant factor. I have a similar attitude to tools - nothing is ever perfect and if I wait for it to become perfect, I'll end up standing still. WRT your 90% remark, I am more often trying to persuade a customer not to part with their money on small impact / large effort features on the basis that [a] I selfishly won't find then interesting to work on, even if they are profitable and if they have money to spare for that, how about spending it on X instead, where X will have a large impact. Which I suppose brings me to whether or not, given the depth of change you speculate is required, nested notebooks would give you anything that a bit of familiarity with tagging wouldn't? I think probably so. If you can nest notebooks, you then have a more flexible and discrete method of offline notebook access / notebook sharing. If EN allowed you to offline / share on the basis of a tag, that advantage would evaporate I suppose.