Thank you Fungus and ntcnico, your explanation really helps me.
I'm not particularly interested in digital decoding. When I (rarely) try decoding I use an usb logical analyser box connected to my computer and I never missed to mix digital and analog signals. This scope has the digital channels activated, but even a simple protocol like I2C will not be easy to follow (at least for me) in raw without a decoding sw...so probably this part of the scope is quite useless without purchasing some protocols...
The price it's offered is 1.6K euros (taxes included). It comes with all probes (included digital channels). I would have preferred to have some other options installed like the ARB generator, but for the activation list price (720 euros) there are good options in the market and with 2 channels and higher specs...
Anyway , should it be a good deal in your opinion?
It depends.
Segmented memory means you can have 100rds of separate trigger events, capture them over an, say, hour, and then go back and forth replaying them and analysing them. With it RTB2000 has 400-500 MPts available total. Without it all you get is 10 Mpts (20 Mpts when using only 2 ch). Regardless if you use auto mode (all data fits to screen) or fixed memory mode.
Without any options and only high bandwidth used scope for 1600€ is not such a good deal. RTB2000 without any options is not much of a scope. All the otherwise nice stuff about it won't be available to you. Siglent SDS1000X-E (or equivalent) literally is more capable in features..
You end up with really basic scope with nothing that much cheaper scopes have that have big screen and decent 10bit converter.
For 1200€ nowadays you can get fully loaded Siglent SDS2000X+. Heck, you could do a leap of faith and get a new Rigol HDO scope and get 12 bit scope that is analog only if that is all you need, for less money.