Totally fair. There's a few things I'd like to point out:
* I get to push the EEG button with just my brain, which is neat and fun.
* I get to build multiple high resolution EEGs into something that doesn't look terrible like a pair of headphones or a hat, which is fun (yet flammable).
* I play a few instruments (most recently bought a violin, which I'm still terrible with). It took years to become good at each instrument. I assume that it would take years to become good at using a BCI and properly adjust it to my brain.
* I'm working on this with the initial assumption that I'm most likely going to fail, but I'm going to have a good time.
I'm neither a doctor not a psychologist but here is a wild guess: I would assume that it takes about as long to train yourself to work with a BCI as it takes to e.g. learn to reliably wiggle one ear, raise an eyebrow, just any voluntary movement that you do not control yet. Reasoning: in both cases you would have a feedback loop and would need to learn to reliably create the appropriate output and that it does not matter a lot whether the output goes to actual muscles or via EEG to trigger a response.
