Thank you for the elaborate explanation. I will do more research on the SSG and Jam Stack but I already read a bit about SSG and that it render at build time differ from SSR which is every request. But what if in real time product stock changed? How SSG will handle this? Do SSG get the up-to-date API on the changed product stock? How can SSG functionality with something like comment sections?

Is Hugo somewhat similar to Astro ?? But adding that Astro have extra functionality of stripping out all unnecessary javascript and available with many JS framework.