In our environment we deploy patches with forced reboot of 3 days. We have received tickets from users that inform us that they never seen the Reboot Prompt and therefore when machine is rebooted (forcefully) are not happy with the overall user experience. In few instances we have received escalations from management about this to inform us that this will reduce user productivity and is not good for overall user experience. If we can add some additional logging that would show when the reboot Prompt is displayed and options selected by the user (Delay xx minutes) it would help our support folks during troubleshooting and does avoid any discussion about Reboot Prompt being shown or not.
Our BigFix environment that we're running is 9.5.13.x and we do have plans to upgrade to version 10 later this year.