Other happenings besides server upgrades are the introduction of better statistics software as sites get moved to the new machines. In the past year, we've also replaced the backup software we use. Most ISPs back things up to tape, which can take hours to retrieve files if someone is faced with the task of retrieving lost files. We have, for about three years, backed up to a remote hard drive in another building. Recently we've updated that process again.
All backups are now in the format of a remotely synchronized copy done on a regular schedule.
If a file is accidentally removed, we can get a recent copy of the file from the backup server. This takes seconds or minutes to do. It makes my work easier, and makes us quicker to respond to these tasks which are truly urgent. We have also upgraded power generators, which run the computers during power loss events. For outages beyond that, we use a generator.