Neither hacking nor news... Peculiar...
- cooperative overlap: old school interfaces were based more on turn-taking, with the computer providing a 'prompt' when it was ready to accept more input. Nowadays we tend towards an overlapping style of UX, with the computer following the link which is now under the mouse instead of the link on which one thought one had been clicking, before the last relayout.
- dialect adoption, like software adoption, shows strong network effects and path dependence.
Nevertheless you can still go back to the old more tech heavy frontpage (AFAIK it uses a previous HN ranking algorithm?):