Talk:Forma/@comment-212.92.194.140-20130912153750/@comment-13014780-20130918090614

"Any installed supercharge will remain"

In other words, Catalysts and Reactors are still installed.

As for the benefit of using a Forma on a frame or weapon, it depends on how much you really need a different polarity slot. With weapons, using a Forma will obviously allow you do to more damage, though they're a bit of a pain to level up again (especially without a Catalyst). For Warframes, unless you're hell-bent on maxing a bunch of high level mods (ones with 10 ranks), it's generally not worth it, though it's much easier to level a frame back to 30. I've only used 1 Forma on my Nyx to change a V slot to a bar (because she has almost no need for a V) and have maxed out all of the mods I have equipped.