I probably don't qualify as someone who knows what they are talking about, but I'll share my impression anyway.
I suspect that Intel's yield ramp is quite a bit slower than TSMC. And I believe that is a byproduct of their previous business model. When you are going to hit peak output in 3-4 years and shut the process down within 5-7 years you want to get the product out the door as soon as it is good enough to make money. That's what Intel has done for decades. And I think that issue is reflected in the 18A PDK where Intel's PDKs weren't as mature as TSMCs for a given milepost (0.5, 1.0). Intel was willing to accept the additional churn of process changes because being first to market was so important.
TSMC's business model (and Intel foundry going forward) requires them to have far process stability when they start running client silicon. So they have developed a different approach to get yield up and stabilize the process as quickly as possible. Intel is learning how to do that and 18A is the first real process they have to learn from. So I'm not surprised there are more than a few bumps in the road. 14A will be our first chance to see if Intel has learned those lessons and it isn't as far away as you might think. To the best of my knowledge PDK 05. is due out somewhere in the Dec'25 - Jan'26 time frame. If Intel has learned from 18A it should be locked down much more than 18A was.