I recently tried it again, Laverna is very buggy and I just received an email from dropbox noting that the api they used is being deprecated. The app isn't really native, just a chromium window running a local web app. So if it needs to be mobile, I am using onenote, but have to use the web app in Linux, and search is useless on the web app. So for desktop only, I use Zim. Cross platform, lots of plugins, stores ever…
Does Zim now support Markdown as a storage format? If so then perhaps the issue of storing arbitrary text is resolved.