I won't claim any level of tooling/IDE parity, but FPs are quickly getting up there.
As an example, Haskell has a very helpful community, lots of stimulating content (yes, some are math heavy but many/most are not), over 3000 packages on Hackage (many of which are really excellent), 700+ people on IRC at anytime constantly talking/answering questions, at least 3 major web frameworks, many concurrency libraries, database drivers/libraries for almost anything, an astounding number of utility libraries and a real world-class, top of the line compiler (GHC) that produces blazing fast, robust code. Many companies are building commercial/proprietary tools with it for mission critical applications.
As an example, Haskell has a very helpful community, lots of stimulating content (yes, some are math heavy but many/most are not), over 3000 packages on Hackage (many of which are really excellent), 700+ people on IRC at anytime constantly talking/answering questions, at least 3 major web frameworks, many concurrency libraries, database drivers/libraries for almost anything, an astounding number of utility libraries and a real world-class, top of the line compiler (GHC) that produces blazing fast, robust code. Many companies are building commercial/proprietary tools with it for mission critical applications.