and yet, time and again, third parties have proven unreliable in that regards.
Also, if we install a MOD here, then people will ask "Why can't I have this in the core product, since it's part of the main system"
In reality, the best option is NO CAPTCHA at all -- get 2.1 released and use the questions feature with the multiple answers and multiple language support - because THAT *IS* a core feature.