So I have coded everything from dumb web servers (tm), to high performance trading engines (tm). I have toyed with doing the list in parallel thing... and used it in a toy GUI tool or two I wrote... but never really found it that useful in the real world. If you actually want high performance, doing a parallel map is not going to be fast enough. If you are a dumb web server, it's a waste of overhead 99% of the time.

But hey, if you want to use map when you actually need to do a parallel map, cool. But seems very very uncommon. ~ 1 in 10,000 maps I write.