Landscape upgrades for registry hosts

Hi @nribeka & @sconrad. We currently have the registry app server & load balancer in Landscape for updates (and there are some updates pending). A couple questions:

  1. Are there additional hosts we should add to keep up-to-date such as non-prod hosts?

  2. Other than reboots which of course we want to schedule for off-hours, do you know if there are any packages that we should worry about upgrading without careful testing? (In other words, can we plan to push package upgrades regularly during weekdays without concern?)