This really has been my experience too. I gave Notes a try, but moved back to nvAlt. I’m currently using Ulysses, mostly because I do like the writing experience and wanted to get more familair with it. Still not sure it’s a place for reference notes.
2017 The Year I Stopped Worrying About Syncing by (macdrifter.com)
Photos show up everywhere with Apple Photos app, my music library and custom play lists are always available through Apple Music. I barely think about the mechanics of how my data moves between devices.