I was on Obsidian for a while, moved away to try Supernotes and other competitors, and now I'm in the process of moving back to Obsidian.

Has everything you want I think with plugins to do a ton more while still essentially being just Markdown.

The part I'm a bit confused about with obsidian is how it works with a mobile app

My understanding is every device syncs its own full copy of everything?

So if you have a lot of images/PDFs, does your phone have to be able to hold everything at once?