Conversation so far:
What is Nelson Piquet's connection with racing team Lotus?
Nelson Piquet and the number 1 went to a stagnating Lotus team in 1988
What was the outcome of Nelson Piquet and the number 1's migration to the Lotus racing team?
His career took a nose dive.
What happened to the Lotus after Nelson Piquet and the number 1 joined this team?
A stagnating Lotus team in 1988 took a nose dive despite the Camel sponsored Lotus 100T having the same specification Honda V6 turbo that powered the McLarens
What was 1989 like for Nelson Piquet's driving career at Lotus?
Nelson Piquet had a dismal 1989 season, driving a Judd V8-powered Lotus.
What else is interesting about Nelson Piquet's career at Lotus besides his career taking a nose-dive, driving the same cars as Mclaren and struggling or the Lotus team stagnating in 1988 and 1989?
When Lotus informed Nelson Piquet during 1989 that they would be using the Lamborghini V12 engine for 1990, he decided to leave the team.

Question: What did he do after lotus?
Self-contained rewrite: What did Nelson Piquet do after Lotus?