Universal LLM Memory Does Not Exist

Over the last few weeks, I’ve been digging deep into LLM memory systems. My last post described the techniques they use. Whenever I mentioned tools like Mem0 to engineers running agents in production, I got the same reaction: a collective sigh . “It’s heavy.” “The latency kills us.” “Great in theory.” I wanted to understand why. Systems like Mem0 & Zep are sold on the promise of reducing cost by…