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I did once consider building this into the site. It's not on my radar at the moment, mainly for the reasons described in that link. The best I can do is to create an issue out of your post so that when people look at the code in the future they may consider implementing it.
arrive.js is handy for waiting for elements to arrive. I think you would just need to include both jQuery and the main arrive.js script in a Tampermonkey script to get it to work.