See, for instance, Spreedly's documentation - an incredible service btw for future-proofing your payments stack and allowing PCI-compliant routing to practically any payment processor. (Not affiliated, just a happy customer!) The only time I'm not a happy customer, though, is when I'm time-constrained and have to load the docs, because this is their Lighthouse report:
https://lighthouse-dot-webdotdevsite.appspot.com//lh/html?ur...
> Performance score 8/100, first contentful paint 9.5s, TTI 16.1s, 5s for style & layout, 3.5s for rendering, 43k DOM elements
All that said, Slate is really great. I'm certainly not asking for Spreedly or anyone else to switch tech for their docs. The benefits outweigh the costs.
And I get that you can't have gradually-laid-out content and also preserve scroll position on refresh in a responsive environment. Theoretically, you could, but you'd need to exactly measure your text size at dozens of responsive breakpoints and pre-set each section's height, which would require a headless browser as part of the compile pipeline. And the last thing we want, especially this week, is advocating for documentation sites to take longer to compile. So perhaps this is the local optimum. But hopefully there are other more creative solutions!