Yeah, think as tv84 and 2N3055 mentioned it's very early in the lifeline of this new HD DSO.
They did spend significant $ on the custom chip developments, so maybe Rigol decided to release early to save debugging $, and have early adopters help with the debug? This could be their business release plan for these new HD DSOs!!
We were very interested in the Channel & 12 bit ADC Linearity, this would be mostly for use with FFTs. Now raises the question in light of what we know, is linearity a factor for this HD DSO??
Anyway, it is what it is and has damped our initial enthusiasm some, being not as well polished as we had hoped.
Best,