It looks like it's still bigger than the logic board on the 12" MacBook from 2015.[1]
I really wish Apple would resurrect that form factor, as every other MacBook since has seemed bulky in comparison. Thanks to OpenCore Legacy Patcher[2], I still haven't gotten a newer mac. With a modern M series chip, it wouldn't have such rough tradeoffs in battery life and performance. I'd definitely buy it.
1. See step 11 on https://www.ifixit.com/Teardown/Retina+MacBook+2015+Teardown...
What version of MacOS are you running on yours? I have a 2017, 16GB, 1.7ghz and it's DOG slow on Ventura, even with reduce motion and reduce transparency. I have considered downgrading just to see if there's improvement.
I just helped a friend replace her eleven year old 11" Macbook Air with a new M4 Air.
her review: “this thing is HUGE :( :P ”
The Neo actually has similar dimensions to the 12” overall, though not as tapered. That’s possible because it has a much slimmer bezel. The Neo is about a third heavier though.