The JAMstack is not about specific technologies. It's a new way of building websites and apps that delivers better performance, higher security, lower cost of scaling, and a better developer experience. No rendering means greatly reduced attack surface area for malware, ultra fast hosting on CDN, no debugging php or optimising rendertimes, and a super cheap way to scale your hosting.
JAMstack Israel is created to focus in the areas of static site generation, the modern web ecosystem, web apps and web hosting and performance solutions. And of course to power a larger part of tomorrow's internet!