I hate that thing! Is there a way to switch it off? (I get it, it can be useful. It's my personal preference, and showing it is a sane default. Less intrusive than a (modal) pop-up for sure. But I like software which I can set up to my liking.)

It's in the 'Chrome' menu. 'Warn before quitting'.

Ah, thanks. I use firefox as my daily driver, but go to chrome for some web pages anyway.

I'm hearing about this feature for the first time - and I frequent HN and other tech sites!

For pop ups, automatic or it doesn't exist.

I really wish this was standard across all apps on macOS. It's beautiful UX, and easily discoverable.

It's not accessible. Applications that are meant to be used by the general public should avoid making assumptions about how the user presses keys. Specifically some users with motor impairment may find this kind of "long-press UX" to be troublesome.