What if we looked at all of the cloud providers APIs, which may or may not be similar to one another, may be in constant flux, and may have undocumented quirks, and hid all that complexity inside of one black box that provided a single clear API. The guts of that black box might be kinda ugly, and might need at lot of constant updating, but for a lot of users (including me), that is more appealing dealing with all the raw complexity of the various cloud providers "offical" APIs.