The Tragdante do trace their memory back ten billion years, and have existed as a sapient species for billions of years. However, they're not like humans, they don't care for constantly amassing knowledge. Therefore, they stopped advancing their biotechnology once they reached a point where they felt further advancement would be pointless, and a waste of resources. Not to mention in their ten billion years, they have developed their own universal governing laws that prohibit certain things.
I could go on, but further insight into the Tragdante's history could be granted over a period of updates if wanted.