In the Star Trek: The Next Generation episode The Inner Light, the probe used to connect to Picard's mind seemed relatively advanced (at least more so than what we have now). Riker said the device used to create the illusion to Picard had "self terminated". He then presented Picard with the box containing the flute.
Was there anything else stored in the probe, and if not, why wasn't there? It would seem sensible to include at least one encyclopedia or something of significance that wouldn't weigh too much. Something that could be shared by more than one person. Also why did the machine self terminate, as other people could have had the same experience (like reusing a hologram)?
Also, I may be wrong, but I sort of got the impression Picard did not tell anyone of his experience. Is this true? Did Picard record the lost civilization or did he not mention it?