Streamlit seems very much alive. I used it on and off in the past. Went to their website and it looks very much alive.
Ditto for Weights and Biases.
Yes, it's active and even had a new release last week
it's because this is just unverified slop that i doubt was thrown together by a human. Langfuse has ongoing conferences and is still used by many frameworks.
They are in the "Year unknown (12)" category but that's a weird thing to include.
Plus they aren't even AI products, but either have vigorous pre-AI use (W&B) or are completely non-AI but just used by lots of prototypes (streamlit)