That gur feeling like you are missing something important is nothing more than psuedo FOMO. Its complicated and contrived for no good reason at all. SSG are good. Plain HTML is even better.
I would always advocate for plain HTML, or some basic templating engine. But such a statement highly depends on your needs. Plain HTML is great when you know exactly what you're building. As soon as you're going for something a bit more dynamic, or when certain elements require conditions, you quickly move to either SSG or some for of SSR.
Not saying you have to use whatever latest technology people are advocating, but use whatever makes sense to use. Plain HTML has its limitations, that could be solved with SSG or SSR.
I would always advocate for plain HTML, or some basic templating engine. But such a statement highly depends on your needs. Plain HTML is great when you know exactly what you're building. As soon as you're going for something a bit more dynamic, or when certain elements require conditions, you quickly move to either SSG or some for of SSR.
Not saying you have to use whatever latest technology people are advocating, but use whatever makes sense to use. Plain HTML has its limitations, that could be solved with SSG or SSR.