> In general once you start thinking about scaling data to larger capacities is when you start considering the cloud
What kind of capacities as a rule of thumb would you use? You can fit an awful lot of storage and compute on a single rack, and the cost for large DBs on AWS and others is extremely high, so savings are larger as well.
Well, if you want proper DR you really need an off-site backup, disk failover/recovery, etc. And if you don’t want to manually be maintaining individual drives then you’re looking at one of the big, expensive storage solutions with enterprise grade hardware, and those will easily cost some large multiple more than whatever 2U db server you end up putting in front of it.