Hi Marco, yes definitely OpenGL drivers have been problematic. Video drivers are the most complex piece of software running on your machine and so they also tend to be the most problematic as well.

I'm sorry to say that no Metal is not a magic API that somehow automatically solves this. There can still be plenty of unoptimized areas and bugs in Metal as well. You don't have to take my word for it, just see the above link for examples where OpenGL was faster than Metal on the same machine.

We are getting to the point now where on new operating systems Metal is going to be better quality than OpenGL though. The reason why is simply that Apple is not doing any work on OpenGL beyond some bare minimum level and all their effort is going in to Metal instead.

- Michael