The RTB2000 was a great 'entry level' scope 3.5 years ago. I like many others here got it at the intro price, and at the time it was a great deal (~$2200 or so fully loaded). Now the B-Market has caught up with a vengeance since the RTB2000 was first released. As much as I like the RTB2000 still, I doubt I would have still purchased it today if I was in the market for a new scope. It is still a great scope, just much harder to justify even at sale prices imho.
This is where R&S could start releasing some feature upgrades, to keep the attractiveness. Additional serial decodes like I mentioned could be a possibility.
Or significantly reducing the price for the bandwidth "upgrades" which is an outrageous concept anyway (ever heard about a car with an software limitation of the horsepower, which offered paid upgrades to remove that limitation ?), at least for hobbyists. Not 20% off. Divide it by 10.
I do have some experience with "B series", specifically a Rigol DSA832. Not a scope, I know, but it speaks about the company. Not super happy with the quality of the firmware. Lots of crashes, some weird annoying bugs, and missing features which made usability for some use cases much harder than what it should/could have been.
I also have experience with a R&S CMU200. Felt much better. So I hope that R&S made a better job than the B-series with the recent products, which would help justifying the price. But seeing the reply above, not sure the R&S software is bug free....
R&S has a ridiculously large range of products to support, and I expect all of them could use some additional developer love in one way or another to improve upon them. More decoding options would certainly be welcome. I expect the code already exist to bring the decode options on the RTM/RTA over to the RTB if they wanted to.
***WARNING OFF TOPIC RANT****
R&S makes some bizarre choices on some things imho, and alot of their product range could use some additional love. Take their newest power supply offerings: NGL, NGM, and NGP series. The desktop software to "control" these power supplies is ancient (HMExplorer). In fact none of them can actually be fully controlled by this software to my knowledge. It is so bad that I would be straight up embarrassed to demonstrate this software to a potential buyer. There is no comparison to what Keysight or Keithely(Tek) each provide to support their power supplies.
The NGM power supply is hardware wise one of the most advanced power supplies on the market, yet it has no real analysis software like it's predecessor the NGMO. It has a ridiculously simple software to get a graph of the outputs that honestly looks like it was written by a undergrad on their summer internship (it also crashes pretty regularly after a single use). Again, completely embarrassing for an A-brand company.
One of the main features of the NGM is battery simulation, yet there is no battery analysis software (besides the built-in simulation part itself). Hell they don't even provide additional internal logging features specific to that function. Its like they look at their competitor (Keithely), top every hardware feature Keithley has, but then ignore the fact that the Keithley actually does provides analysis tools to support that feature (both internal and external). The NGM is still a badass power supply, but it feels 'unfinished'.
**Keep in mind, I'm mainly pointing out the bad while not mentioning all the good**
I know I'm getting a little off topic bringing up their power supplies, but I just want to demonstrate other areas R&S seems to be completely ignoring software wise. All the supplies I mentioned are much newer than the RTB series (some more expensive than), and they are getting little to no love either. By comparison the RTB series is actually doing pretty good. R&S seems to be just happy providing SCPI commands and let their customers do the rest. While that is "ok", and I certainly do write my own tools to deal with that reality, I still think it looks bad when their closest competitors put in much more effort making software to support their hardware.
***END RANT***
Long story short, don't hold your breath on getting new features. R&S has/does occasionally pull a happy surprise by allowing a few trickle down features from the RTM/RTA series, but they also intentionally hold back stuff to differentiate the models. That said, I'm honestly pretty happy with the 2.3.0 firmware on the RTB, and overall still very happy with my RTB.
I do still really like R&S products, and because of their previous support I do check to see their offerings if I'm in the market for a new device. Although, no one is good enough to get a free pass when it comes to pointing out their faults, or areas that need improvement.