Earlier quoted context omitted.
You can pretty easily change from Cloudflare to any other Jamstack host. Cgi just isn't necessary anymore and would be more baggage than anything at this point. The old web stacks are just time sinks. It's so much nicer to be able to git push... And that's it. Done.
Forgive my digression but for years I’ve seen small efforts here and there to elevate the concept of a “stack” and promote it as the level abstraction to use when discussing web apps and the like. What’s up with that? Grab any 3 commonly used pieces of technology whose names can be used to form a fun initialism, append stack to the end, and soon there will be experts speaking at conferences dedicated to it. JamStack…
More broadly, other acronym stacks are a thing because complementary technologies cluster together, especially in relatively immature ecosystems. E.g., PHP traditionally had better support for mySQL than for competing databases, so if you were building an app in PHP, you probably used mySQL for data storage. These effects may have weakened over time as the graph of ecosystem integrations has grown more complete (and indeed I feel like I hear less about acronym stacks these days than I did half a decade ago), but I don't think they've died out entirely.