I wouldn't rely on guidance. I've been waiting for them to approve a commit for something as basic as token counts for OAI models for weeks now. It's just not actively developed enough for serious use cases.
Kind of a chicken-and-egg problem (to be widely used, it helps to be simple, but not all simple-to-use products make it to being widely used). TensorFlow vs PyTorch anyone?
Now, which will be more likely to be widely adopted? No one knows, just keep using both, learning both linguistics and hopefully one of them gets enough traction and all your effort put into building something with these two doesn't go to waste, fingers crossed.