Thanks for all the answers and discussions.
To summarise:
I guess nobody is interest to split the list. At least no dev mentioned a
need.
Tags are good but might need some guidance to use a certain set and possibly
shorten them wherever possible.
The issue with to long tag list is not only a problem for people with large
fonts. Many of us start to read mails on our smartphones where space is
limited as well.
Using [Orgmode] as a tag on the orgmode list is an arguable point. Maybe the
someone higher in the queue like to make a decision to shorten it to [Org].
I would like to start to write something in worg and then we might see how
useful it is.

Best regards
Torsten