water injection questions

[Ryan Harrell]

I was reading my friend's Car Craft from 1980 and noticed an article 
involving water injection to reduce detonation.  My question is: What 
happened to this wonderful idea?  I saw an ad toward the back of the 
magazine in which Edelbrock that was selling their Vari-Injection 
system. However, such a system is not in their catalog anymore, nor can 
I find any mention of water injection in my current magazines.