"Mention" Users

We are missing the "mentions"-feature (e.g. @USER), that is common in all modern communication plattforms, in ER. 
This means, a user can mentioned with @USER (autocomplete) another one and this user is linked and also get's a email-notification about it. Would be great everywhere, e.g. comments, Notebook, KnowledgeBase, Task-Description, Wiki.

Hello Marcus,
I am pleased to announce you, that autocomplete for mentions is now in internal testing in our system. Release of this feature is coming soon. Thank you for your interest.

Hello Alexander,

unfortunately not yet, version with autocomplete for mentions will be released in February.

That's a standard feature any decent PM tool should provide. Thanks for finally implementing this!