Quick question about gem plugins in core

I've been learning about plugins, and started comparing the pros and cons with respect to creating gems instead, when I came across this ticket: http://dev.rubyonrails.org/ticket/6726

Since it hasn't been touched in a long time, should I assume that having Rails plugins that have instead been packaged as gems will not be supported in either edge or 2.0?

Keep in mind, I have no opinion one way or the other - I'm still learning about both plugins and gems - but knowing what core will do will influence my approach.

Thanks! Jeff