Longer doesn't work because it has to fit in existing bags people have. Thickening it won't work because reviewers will then complain it's too thick.
I have a Toshiba laptop from around 2012 which has a slide-out optical drive. To me, it's thick but not too thick; it's just right. If we could return to that size, I think we'd be good. It'd also support better cooling (my Framework 13 with an i7-1280P gets hot, and there just isn't enough space for a bigger cooler). Reviewers over the past 10 years have pushed for thinner and thinner, and we gave up too much in the meantime.
Same goes for screen bezels and built in webcams. All else being equal, a cam with a bigger sensor is better because it can capture more light. Thin screen bezels force a small webcam, and thus your laptop has a shittier camera than a 10 year old smartphone.
In both cases, I don't think actual customers care all that much past a certain point. Reviewers have been deducting stars for a slightly thicker case or a slightly thicker bezel than other models on the market, and customers just go along with it.