In a different post I mentioned I'd left Dropbox, and that I was replacing Evernote with Obsidian. I had lots of good suggestions for markdown editors, and one that I'd never heard of, but I've been testing today is Silverbullet. It's main appeal to me is that I can use it effectively on iOS since it has a mobile friendly web interface.
My setup is I'm using SyncThing over tailscale to keep my laptop and server in sync, I run a local instance of SilverBullet on my laptop and the wepapp on my iPhone over tailscale to a SilverBullet instance on the homelab server.