@udon Thanks your opinion.

I can disable qvitter by default (non registered user UI) by following configuration anytime.

$config['site']['qvitter']['enabledbydefault'] = false;

I like classic UI and I keep using classic UI (registered user can switch UI anytime). And user can use desktop/mobile client application. So I think it is not important for web UI personally.

But many user avoid using GNU social due to old classic UI looks. And after installing Qvitter, my user satisfied this new UI, and registration is increased.

gnusocial.jp is aimed to promote GS. So I selected Qvitter.

And it is not problem because you can receive our posts from your timeline. I think you do not need to directly access our site by web browser.

I think almost people use modern web browser. User for old web browser is a little.