Comment by OutOfHere

It's not irrelevant because it's not merely about knowledge cutoff. The reasonable presumption is also that newer models are superior in their objectivity and their intelligence, not merely in their knowledge. Newer models are simply better AI than older models, and are therefore more suited to guide an individual appropriately. It's the same reasoning as why one wouldn't want to use GPT-3.5 or GPT-2 anymore. To paint it as being merely about uselss knowledge is a gross misrepesentation.

Also, beyond a point, the knowledge does also matter. Imagine a model stuck in the past that thinks that Biden is still President.