in reply to to use or not to use

I process forms all the time just by calling params and url_params, which I doubt come from CGI (or do they?).

Yes, they do. :-)

So yes, you should continue to use, until such time as you have an active (and demonstrable) need not to.

If God had meant us to fly, he would *never* have given us the railroads.
    --Michael Flanders