I made the same transition, and it felt very seamless. I didn't look into the Obsidian first-party sync service, since I was already using Syncthing at that point.
For even more contrast with Evernote: the fantastic Obsidian application lists eight employees and one cat on their about page:
Same. Obsidian is a bit more DIY feeling, not as polished of an interface but it does exactly what I need… and their sync engine is fast as hell. I pay for sync. I know I don’t need to if I really wanted to run it for free, but it’s worth it (and 50% cheaper than Evernote soon, while supporting the company)