+1
And also this is just one forum... This forum has a membership of some 300,000 last I checked. There are literally at the minimum hundreds of forums like it, possibly thousands if you add in all the manufacturers forums, and the magazine and other review forums. I believe your estimate of us being a fraction of 1% may be slightly short of the true percentage of people on forums for Android phones.
Still and more importantly as these phones get higher and higher resolution cameras, as people buy more and more music and video content in their phones, as the mass of sites data becomes a greater and greater part of our everyday lives the need for a safe, secure, resident and removable archival backup system becomes more and more relevant and necessary.
Backups will not go away for a very long time IMHO, not until someone invents and perfects a storage method that is infallible, ultra fast, encrypted but with a safe way to recover and reverse that encryption, and dirt cheap. It may be a hologram type storage that either is about to be, or already has been invented but not yet perfected, or some other as yet unknown method.
Until then, removable SD cards are the most efficient system available. We now have cards that are fingernail in size and which can hold now upto an incredible 200GB (
200GB SanDisk Ultra microSDXC UHS-I card Premium Edition and can deliver that data instantaneously at an amazing 90MB/s. There isn't a Wi-Fi or USB storage device or there that can come close. Even the far less impressive 128GB and 64GB cards are still mind-blowing in their own right.
I don't like that manufacturers have moved away from removable storage, especially since most plans now are based on pay as you go Data and cloud storage is really the only other similarly convenient method of storage.