[quote=@GalaxyRaider]
<Snipped quote by Host>

Do they serve a practical purpose? Do they help you train and get stronger or something?
[/quote]

If you buy the cheap knockoffs, they can just [i]decimate[/i] your code. But if you invest into some nice ones, they limit your overall strength so you have to rely on your skill and whatever remaining power you have left.
*Tosses you a small cartridge*
Try one out if you want.