The bus protocols seem not to be one of Rigol's strength. However it doesn't matter to me, I've got the Hameg HMO in parallel, which has got much better bus decoding options than Rigol.
Rgds
Gunb
Although that Hameg has only 2500 waveforms per second and it looks like a small poor scope... But in fact it is a compact powerful machine from Germany.
"Only" is
only mentioned because Agilent (Keysight) makes big stories about wfm/s to sell their expensive scopes - where most of the users don't need really high wfm/s.
Most of users of scopes for general purpose don't need such high wfm/s including myself although I've got a few scopes in my office which make up to 1mio wfm/s.
Meanwhile Hameg has increased the wfm/s of the current HMO3000 series to 4800wfm/s and it has got a real trigger output not only a passthrough which enables to measure the wfm/s - if needed.
Got one on my desk with 500MHz bandwidth, so you're right, it is a real powerful as the previous HMOs, too and I prefer the size very much since it's the perfect partner on my desk where other devices have to be placed on the cupboard.
The Rigol is not bad, firmware issues are quite common to all todays manufacturers. Even Agilent has got firmware issues, found them already.
Rgds
Gunb