Not quite forgotten. The minuet from the String Quintet in E has been used in a number of popular venues including animated cartoons if I recall correctly.

I like his work a bit more than Mozart's (I know that's like blasphemy!) and almost as much as Haydn's. I consider him a worthy successor to Vivaldi. My favorite Boccherini works that I am familiar with may be the guitar quintets. I find this a pleasant combination for a chamber group, the guitar taking away some of the scratchiness I perceive in solo bowed instruments.

He was also very prolific. Yes, I think Boccerini is certainly underrated.