The new UE radio is basically the same as the old SB Radio, except for the firmware.The old ones can be "upgraded" to the new system. You can't stream local files directly, they need to go through the cloud first. Hopefully they will introduce a Touch replacement or something similar.
With the old ones, every indication is that at some point a few years down the line, you'll lose the apps that go through mysqueezebox.com, but should still be able to stream local files as long as the server still works with your OS.
With the old ones, every indication is that at some point a few years down the line, you'll lose the apps that go through mysqueezebox.com, but should still be able to stream local files as long as the server still works with your OS.