It seems pretty unavoidable to have an overloaded brain. It just happens naturally if you're interested in learning skills. Plus you don't get brain cards fast enough.
I had already learned everything by the time the new brain features debuted. My brain is seriously over-taxed! Look at the sweat dripping off it! Mmm, brain sweat...
I have been at 600-800% over capacity since I started to play again, but the only skills I could bear to unlearn were cooking skills. I use all the rest of them, so they are essential. So demand will continue to outstrip evolutionary supply, I guess. It certainly has provided me with plenty of prep time, collecting resources to apply once my learning comes to "skillition".
I don't know, I guess since I apparently keep my brain inside a rock with spectacles, I don't have to face any personally disastrous consequences, which would most certainly occur in any other life situation where demand outstrips supply by those percentages. I mean, I would think my rock would have exploded by now, or fomented a desperate rebellion, or oranized with other rocks and gone on strike. But he seems to totally dig it, go figure.
Nanookie: Stuff like fruit changing and bubble tuning can be unlearned and you can still do them. Spice grinding, too. They will occasinoally fail, but that's it.
What sucks is that all of old-schoolers from when Glitch first really started were kind of screwed on all this. Once the brain capacity thing started... we were all over filled to the brim. :\
Brain capacity 56/45 skills, 71% time penalty, and I haven't purchased many brain capacity cards yet. I don't know how to cook (anymore) and I wouldn't bother with any AK except you need AK3 to feed sloths. also, no croppery and minimal gardening. I don't recommend it to everyone, but just to point out that no, you don't need to know everything.
WalruZ, there's need - and then again, there's need.
Thanks for the replies all, I'll just keep shuffling 'til I get more brain cards. I'm only at 36/27, with a 55% penalty - so not bad. I'll work on 4+ hour skills for a while and hope I can grab enough cards to catch up to myself.