alt Hacker NewsThe majority(?) of Intel MacBooks didn't have dGPUs though. That was a higher-end option on the larger models. I also vaguely remember there being a big leap in iGPU performance with Intel Iris around 2013. I had a high-end MBP from work and wished I could perma disable the dGPU, cause I didn't need it and it just made the thing get hot.
But yeah, the remaining people who needed dGPUs can now just use the integrated AS graphics, so they'll notice an even bigger difference.
Skimming Wikipedia it looked like you get discrete graphics unless you have a MacBook Air or 13-inch MacBook Pro. A higher-end option, yes, but probably the more likely one that people actually had here.
And yes, Intel Iris was a good leap forward for their iGPUs at the time! But I don't see any models with Iris and a dGPU, so if you got a model with the dGPU then you would be switching between a potato iGPU and the dGPU.