Software currency is hard. Keeping up with the stream of updates every software vendor releases can completely consume your talented staff of system administrators. And, speaking from experience, update work is less than fulfilling. At the end of the project, you have a different release of the software that substantially does the same thing it did before. There may be minor changes and improvements, but it is hard to convince an end-user community that all the production interruptions update projects sometime entail will truly make things better.