During preparations for M&F, I've found that my existing hosting servers are all very old and outdated and... expensive.
I will be upgrading all of it, meaning that I get more performance for less money, yeah. However, it also means I have to move everything to new servers. Everything. Total reinstall.
Like all such major moves, it will likely not go without pain. There will be changes of IP addresses, among other things. I've done this before, so I am positive I can minimize downtimes, but there will be some.