Kinda yes. But if you keep your herb in a dark place, it really will last a pretty long time. Sometimes what happens is the THCa will turn to THC from the light.
We have dabbed oils that were made from plants 4 years old. The plants were ground and dried, and put in a buket and forgot about. Then 4 years later, turned to oil, and it was great!
Also, one time our owner found a sack of weed that fell behind his bed, maybe 4-6 years ago. Found it, vaped it and he said it tasted as it did long ago.