Forum Moderators: not2easy
More practically, there's usually a pay-off between control and convenience: CMS software makes adding content much easier, but there are normally sacrifices in terms of the quality of the output, or you have to invest fairly heavily in time in the early stages in order to configure them properly.
meta keywords
There's really no value in adding these any more. I would use the time on improving meta descriptions or having a nice cup of tea instead :)