Efficiency in coding: inmeasurable. For typical CRUD it's amazing once you get over the hump of setup.

Efficiency in speed: likely very little over just requesting the HTML via AJAX.

As far as scrolling/etc: that behavior is super buggy and I never really tested it. I "turned on" the turbolink-esque behavior as a test but it needs far more work.

In any case, one can just turn it off and revert to regular SSR behavior instead of the AJAX-ey one. I might even do that because, in general, I want my page to show the traditional loading icon in place of the favicon.