I haven't seen anyone else do it, I feel like browser blend modes in general are kind of not used as much as they ought to be.
I also, on the topic of tech details, make extensive use of the new scroll-timeline stuff which lets you tie CSS animations to the scroll position. it has only landed in chrome at the moment (as of maybe February) so I just use it as a progressive enhancement but it's very cool and performant.
Is the future full of billions of independent agents transacting over trust boundaries, or will everything consolidate into one big happy borg?