The original Air lineup was thinner in the front and seemed a little lighter. The thicker front on newer airs gives more battery life, but I'm not a fan of it.
I'm in the same boat. I have one of the original M1 MacBook airs, and the thicker front feels like overall a downgrade in hardware. Going up to higher ram amounts might be good for some of my datasets, but it's not needed for any software I run.
So I guess I'll wait for the next cycle and hope they return to the "Air" idea again.
The thinness at the front was a bit of a hack though wasn’t it? So Steve Jobs could make it look good in photographs. I’d take the extra battery life any day.