The hinge _was_ light on the old ones (deliberately, they wanted it to be easy to open with one hand), but after a lot of feedback like this, they went with a heavier one. I have a 12th gen and a 13th gen (one is my wife's), and the new one has a stiffer hinge that doesn't move if you aggressively move the laptop.

Because it's Framework, you can of course buy the heavier hinge and put it on the older models; I haven't, because it's not a problem for me, but if it's one for you, it's a fix you can do cheaply.