We're encountering a couple of issues with zen mode on our platform that I could reproduce with community.nodebb.org as well:
When zen mode is activated then:
@julian thanks for your input. Maybe you'll find this article from one of the most known SEO guru more authoritative then? 
@julian actually it does impact the search engine ranking. Recommended maximum length for URLs is 75 characters. -> https://moz.com/community/q/url-length-3
Also with forum that support multiple languages, the Japanese or Russian urls become very unreadable with
non-English characters in URL e.g. forum.example.com/topic/000/ウェブゲームのウィンドウ表示が崩れる is read by search engines as forum.example.com/topic/000/ %E3%82%A6%E3%82%A7%E3%83%96%E3%82%B2%E3%83%BC%E3%83%A0%E3%81%AE%E3%82%A6%E3%82%A3%E3%83%B3%E3%83%89%E3%82%A6%E8%A1%A8%E7%A4%BA%E3%81%8C%E5%B4%A9%E3%82%8C%E3%82%8B
@julian Thanks a mil for your prompt reply! Too bad it doesn't exist yet but I'll forward the script to our devs again thanks
Regarding GDPR, you might want to review your registration process. When signing up, it seems that there is a bug going on as the new user need to sign up for the newsletter to be able to register... At least that's happened to my colleague.
@julian @psychobunny @baris is there any other way than the one mentioned above to prevent moderators from purging any content?
@PitaJ thanks for your reply.
We're actually wondering about the following feature:
"Send an email when someone reply to my reply"
Is that already available? 
We're using NodeBB comment plugin that we added to our WordPress blog. When users start commenting, they get then notified for every single answer when they actually want to be notified only to their own reply.
Is there a plugin or a known hack to receive notification email to own reply only?