Bookmarked “I love email… – Rhoneisms“.
I’m using Typinator (because it syncs via iCloud Drive and don’t nag me to use a 3rd-party sync service), and the built-in substitutions.
Although I still want to buy OmniGraffle sooner than later, which is also an excellent diagramming app on its own, having a dedicated app to create flowcharts is very appealing. I just found Diagrams for macOS, that just does that.
And the best, it’s a beautiful native Mac app, not the usual Electron crap.