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If you need better reliability in case of hardware failure, and you know what you're doing, you're still better off just renting two servers and doing DRBD and floating an IP or something like that, depending on what services you run.
Heck even at three servers and a Pacemaker cluster (so you can do quorum) you're still doing it cheaper, and then you get some experience with HA platforms :-) (of course, that also takes more time to set up and admin)
Also, with unlimited bandwidth, you don't need to worry about "oops, my backups failed and ran in a loop / someone DoSed me / I got redditted / someone pointed their Docker at an image I host for their entire cluster" and suddenly you have a $1k bill.
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