The removal of SD cards always just felt petty, but at the end of the day, you can either plug in external media, use a wireless hard drive/SD reader, or just access your content remotely on self hosted servers (or use "the cloud" if you must).

Rootability is easy -- the real issue these days is how many things stop working with a rooted phone which makes it much less desirable than it used to be. Though, it's also a lot less important than it used to be, as many of the old functions that required root just don't any more, either because of changes to the system design, or because of workarounds.