Earlier quoted context omitted.
> What's your strategy for dealing with jquery not getting loaded? Host it on your own infrastructure so that it's the same reliability as your site itself?
That might be doable if the library is jquery or whatever, but how are you going to replace google maps? Hosting an OSM tiles server is non-trivial, and I highly doubt that you'll be able to host it with better reliability than google.
You can save your site by self-hosting jQuery, but if your business depends on Google Maps you should at least handle failure more gracefully than a blank screen.