It probably matters highly on the use-case, but for us (documentation): Dropbox Paper. Linking between documents is super easy (as opposed to similar "low tech

It probably matters highly on the use-case, but for us (documentation): Dropbox Paper. Linking between documents is super easy (as opposed to similar "low tech" solutions like Google Docs, Markdown files, etc), and features are sufficient for our use. Due to its simplicity, I find it one of the most exciting products recently. (Not affiliated whatsoever)