Conversation so far:
When was the disbandment of the Mothers of Invention?
In late 1969, Frank Zappa broke up the band.
Why did the band the Mothers of Invention break up?
Frank Zappa often cited the financial strain as the main reason, but also commented on the band members' lack of sufficient effort.
What else was significant about the time period when the Mothers of Invention disbanded?
After he disbanded the Mothers of Invention, Frank Zappa released the acclaimed solo album Hot Rats (1969).

Question: What happened after that?
Self-contained rewrite: What happened after Frank Zappa released the album Hot Rats?