What DEVs Think About Tags System in Core ?
Is This Possible ?
1.8 is feature locked. In addition we rejected this suggestion before (don't know whether there was a thread for it)
The current tag system plugins are resource hogs.
You also would need to manage tags well so the tags actually are relevant. If you have a lot of tags when it really isn't relevant to that, I'm fairly certain your SEO score suffers.