Back in the day when I actually had a desk and walls on which to pin things, I printed out and stuck cheat sheets from the 4 languages in effective use in my context: SAS, R, python and C.
The lag/effort was/is far less than google if the info is right there, and I personally found I kept having brain farts where I'd temporarily forget what language the thought I was having was actually in, and could quickly touch base again by referencing the cheat sheet without bringing up the (often distracting) web browser...
Working in a fully offline environment, I have git repository with only documentation for everything I may need. In this situation, a cheat sheet or a searchable doc can save my day.
I think both are useful depending on the situation. Maybe a better question is why I'd want a potentially outdated list of cheat sheets instead google. I bookmarked it anyway.
The lag/effort was/is far less than google if the info is right there, and I personally found I kept having brain farts where I'd temporarily forget what language the thought I was having was actually in, and could quickly touch base again by referencing the cheat sheet without bringing up the (often distracting) web browser...