findinglisp wrote: I had to drop Schieneer and Armed Bear (ABCL) from the list, for instance, because the polling module only lets you have up to 10 choices. Hopefully, those have lower usage than the others.
I do use ABCL! It's a good implementation, and having the JVM as target is actually very good.
I also use XCL (the, er, non-official other Lisp from Peter Graves).
Why, for example, use XCL? I actually test my software with all implementations but two. I really want it to be portable, and testing with all implementations help spot small/subtle bugs in my software. (Some implementations may not complain or misbehave, but others will, so it's best to run through all of them).
The two I don't use are Scieneer (only available if you pay) and Corman (I gave up fighting its GUI)
The two I use most are SBCL and Clisp. Both have excellent debugging support, and SBCL is very fast.