I've previously bounced between different open-source notetaking apps but the great thing about any note format based on Markdown (Standard Notes/Obsidian/Zim/etc), is that it's pretty easy to move from one platform to another if they stop being maintained.
Although in the end I ended up with Microsoft OneNote (with Obsidian for special cases), Microsoft isn't going away and they don't have a habit of killing core products like Google does.
