If you are a SiteGround client and you have been one for more than a couple of years, you probably have noticed that we tend to change our hardware quite often. This has been mine and SiteGrounds' philosophy for quite some time now.
Most hosts will brag about high-tech brand new hardware configurations on their websites but what remains hidden is that they use this hardware only for the new servers they set up. Usually, they won't replace a working machine for any reason. In fact they will keep it (even if 5 years old) until it’s dead broken and they are forced to restore all affected websites from a backup. This means that even if you get a good hardware initially, as time goes by you will be stuck with it and you will get slower and crappier service until your old server crashes and you are “lucky” to be moved to the new hardware.