There are very fundamental blocks, like the ribosome. Or enzymes. Of course over a few million years there was some feature creep, and it turned out that with

There are very fundamental blocks, like the ribosome. Or enzymes. Of course over a few million years there was some feature creep, and it turned out that with a little tweaking proteins can be optimized to perform more tasks and then even squeeze out a bit more efficiency out of folding to the task.