Hi Paulo,
That is, sorry for saying, a pretty dumb remark. Forge components are full citizens of the OutSystems ecosystem, and almost no project can live without them. Even things like OutSystems UI are part of the Forge!
Secondly, all Forge components can be downloaded and studied, so you can always check how a certain component does what it does, and copy that. But like I said, there's really no good reason at all not to use Forge components.