Replace limitations with roadmap note

README.md

@@ -80,18 +80,11 @@ qa.ask("what is the capital of France?")   # not in your docs
 # {'answer': None, 'source': None, 'confidence': 0.0}
 ```
 
-## Honest limitations
-
-- Single-span extraction only: no summarization, no aggregation across
-  passages, no multi-turn conversation.
-- Trained on Wikipedia-style prose, so **tables read poorly**. Convert rows to
-  sentences ("ATA chapter 32 is Landing Gear.") for large accuracy gains.
-- TF-IDF retrieval is lexical, so paraphrases sharing no words with your
-  documents may cause (safe) abstentions.
-- Single training run, single seed, in-domain calibration.
-
-Full writeup, ablations (the 22.4 to 74.6 EM ladder above), and negative
-results are in the project repository's `paper/`.
+## Roadmap
+
+Today the model answers one self-contained question at a time. A conversational
+grounding layer (multi-turn context and follow-up questions, with every answer
+still a verified quote) is coming.
 
 ## Training