This is good advice, and is meant for service based sites that are now more important than ever. But I’m not sure how many service providers can even afford to

This is good advice, and is meant for service based sites that are now more important than ever. But I’m not sure how many service providers can even afford to spend time and money on such things and risk more failures in this process than the current timeouts or other issues. The largest companies would’ve already optimized these (to a great extent) long before this pandemic. One can only hope that in the coming months, websites focus on reducing their bloat and catering to audiences with restricted bandwidth (if streaming services are already doing their bit to reduce traffic, so should others). For truly static websites, the ones without a lot of dynamic or frequently changing content, what good CMSes exist that can easily adapt to or be used with SSGs (for self-hosting, not using Netlify or some other site)?