DIY mechanical keyboard switch lets you set its actuation point - https://news.ycombinator.com/item?id=32722411 - Sept 2022 (77 comments)
Also:
Detailed guide to mechanical keyboards (switch types, hysteresis graphs, etc) - https://news.ycombinator.com/item?id=1539197 - July 2010 (17 comments)
Why does this guy claim that the potential input latency of a debounce implementation negates the latency caused by decreasing the polling rate? This is such a typical non-sequitur I see in computer related topics and doesn't change my mind that mechanical keyboards are yet another gimmick mainly lead by charlatans. Also the fact that you can just set 99% of keyboards, even from 20 years ago to 1000Hz with a tweak.