I've been using obsidian for years as a paying customer. Will continue to pay as price point is good and it just works. However, unless plugin security massively improves I will never install any plugins.
If you can build in one thing, I'd pick something equivalent to Omnisearch. That makes it much easier to find things. I always struggle with the default search.
1. Make community plugins less necessary over time as basic features become part of core
2. Improve the security of community plugins
3. Make it easy to create your own plugins that you can fully trust, e.g. with the recent release of Obsidian CLI