That's right, Helix, yeast has not needed to change. So it hasn't. It was created just fine.
And when it is in an unfriendly environment, like my refrigerator, it slows down. When it is in a more unfriendly environment, it dies.
But the point about the yeast in the lead post was not about that at all, and I can only guess no one here understood what was being referred to. It was about a process that is NOT replication, but about gene duplication -- in other words an extra copy is made. This is one of the primary ways evolutionists think evolution is generated. The fact that yeast are so slow in this area means they simply do not show signs of having evolved at all.