Now the 6.x Client are no longer supported it provides a very good reason to upgrade the client base to 8.x.
But, even when the client has been upgraded to 8.x many of them require further attention again, periodically, to install fixpacks for issues which are present in the initial releases.
Why is it so difficult to get client fixes out to the clients? Windows Updates manage to do this without too much pain from a WSUS server on the LAN. If a Domino server could do the same, to connecting Notes clients, then this would reduce TCO and make the jobs of admins much easier.
Even being able to slipstream the fixpacks into the client install packages would improve things.