Why programmable analog is like a themed box of Lego

The field programmable analog array (FPAA) when it was first offered to the market about 15 years ago did not seem to capture the imagination the way the field-programmable gate array (FPGA) had done before it.

from EETimes: http://www.eetimes.com/author.asp?section_id=36&doc_id=1330353&_mc=RSS_EET_EDT