I've been using TheBrain (https://www.thebrain.com) for ~10 years now and haven't found anything that comes close to it in terms of flexibility. If you haven't looked at it in awhile, it's worth checking out again. They have a new desktop app, much better mobile apps, and even after all these years, development continues steadily.
I've got 16,399 thoughts in mine and add more just about every day. Anything I think I may want to know later goes there. More ephemeral notes go in Apple Notes (I used Evernote for a long time but became annoyed with their business model and haven't missed it). Everything else goes in The Brain.
Search great, the ability to link notes as parent/children/siblings is extremely powerful once you get the hang of it.
It's not free, but it is, in my opinion, easily worth the cost.
I've got 16,399 thoughts in mine and add more just about every day. Anything I think I may want to know later goes there. More ephemeral notes go in Apple Notes (I used Evernote for a long time but became annoyed with their business model and haven't missed it). Everything else goes in The Brain.
Search great, the ability to link notes as parent/children/siblings is extremely powerful once you get the hang of it.
It's not free, but it is, in my opinion, easily worth the cost.