The sensor used for detecting if the lid is closed is an “angle” sensor, although really it’s an Hall effect sensor and a magnet in the hinge. If you have a Hall effect sensor, getting angle data from it is pretty much free, because the Hall effect produces a continuously varying signal, you need thresholding logic to turn it into a binary output.
Given Hall effect ICs are so cheap and plentiful there no reason to use anything else. Also given they mass-produced ICs it’s probably cheaper to buy a fully featured Hall Effect IC, because the manufacturing cost between a basic IC and an advanced IC is almost certainly zero these days.
In short, modern IC manufacturing has just made magnetic angle sensors as cheap, if not cheaper, than dump non-angle sensing Hall sensors. After all you can always use an angle sensing Hall sensor as binary switch if you want, but the reverse isn’t true, so if the ICs basically cost the same, you can expect the less capable ICs to be completely outcompeted by the more capable ICs.