It's worth noting that the Speculation Rules API and the View Transition API are not stable in Firefox and therefore aren't supported by all major browser.
This browser compatibility gap is a crucial point - without Firefox support, these APIs can't be considered production-ready for sites that need cross-browser consistency, undermining the article's central argument.
For me, this is the key takeaway from the article, leveraging experimental browser extensions for preloading future pages. In other words, exactly what a properly thought-out SPA does.
