Of course. But I use it dozens of times a day across dozens of projects. Many of the concepts are linked together. Intelligently indexing, linking, and referencing them seems like a pretty obvious feature. I doubt I'm in the minority in expecting this.
Claude has a way to star important conversations. Don't think chatgpt has that.
My only solution so far has been aggressively deleting conversations once I find and answer and know I don't need it for reference.