Plain HTML+CSS is really good nowadays. You can for example lazy load images with `loading="lazy"` attribute. You don't need JS anymore just to lazy load images. You can use plain CSS for simple interaction like opening and closing menu, toggling pricing plan, etc.

If you're curious with what you can build with plain HTML+CSS, check out my side project[0]. It's a collection of free landing page templates in plain HTML+CSS (no JS). No frameworks, no preprocessors.

[0] Uisual: https://uisual.com