Thanks for your feedback - I'd like to see some more things work without javascript as well.

For the navigation, the links and buttons all work. For more complex components like dropdowns and search we require JS. We have considered server rendering for new things, but for now it is quite high effort for comparatively low gain.

If there are specific actions that you are missing, please consider creating issues - https://gitlab.com/gitlab-org/gitlab-ce/issues/new

Issue about what to render without JS: https://gitlab.com/gitlab-org/gitlab-ce/issues/32401

And I've made an issue to clarify that we require javascript here: https://gitlab.com/gitlab-com/gitlab-docs/issues/120