I've used Obsidian for 5 years now
Obsidian is good normal software, and it's wild to celebrate my 5 year anniversary with it. It has yet to get worse over time. I joined before there was a mobile app, sync, or anything like that, and I've since bought every single service they've offered when it came out. I'm still on the classic $5/month 50gb sync plan. It's pretty good! One day I'll write about how I use it but it's not really anything crazy.