Since this thread is the one getting all the attention right now, I'll post this G5n information here rather than the other "B5n" thread that was started a while ago. This is a window into what can be expected from B3n users based on what's going on with the my experiences with the G5n, since all of the new ZOOM units share the same computer software/librarian (Guitar Lab).
First, here's a link to pdf for all of the updates/additions for the G5n since inception:
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Next are screenshots I just took upon hooking up the G5n to Guitar Lab, showing primarily the "Used Memory Ratio" at 52%. This means that there's plenty of room for new amps and cabinets.
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Evidently, there must have been some sort of update to some, but not all, effects that I had previously loaded onto the G5n, but were showing up (again) as "NEW" items. After loading those onto the G5n (lots of them were delays and reverbs) - about a dozen or so in all - the "Used Memory Ratio" increased to 56%. That's not bad considering the nature of the delay and reverbs (the HD Hall) which are notorious memory hogs, along with the amp and some drive stomp models. I chose NOT TO load the "BOMBER" effect onto the G5n.
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Next is a screenshot showing that the B3n is now a device supported by Guitar Lab. What is interesting is that ZOOM has appeared to have made all a number of effects available for download across all platforms, but not everything - most importantly, NOT THE AMPS AND CABS. The G5n/G3n share their amps and cabs, while the B3n shows them as blacked-out (when connected to the G5n), seemingly to indicate that these cannot be shared with the G5n/G3n. I've highlighted the B5n, and the selected SVT amp model, showing how it is blacked out, and at the bottom the "Load To Device" is grayed-out so you can't download it (to the G5n).
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Note that there is a "Load to device" button, but there isn't a "Offload FROM device" option, meaning that (at the moment) you can't remove an effect from the device once it is uploaded. If you see an effect or amp/cab that you clearly will never want to use, NOT loading it to the device will save you memory. I'm also guessing that when ZOOM does an internal update/bug fix to one of their pre-existing effects/models, it will re-appear as a *NEW* item, as is the case with the BOMBER effect mentioned above.
So, @CharlieC , this should answer your question about whether you can intermix G5n/G3n features with the B3n: NO for amps/cabs. YES for some effects; NO for any effect (compressor, for example) that was created specifically for the B3n (bass specific effects). Thus, ZOOM *could have* made everything available across all platforms, but they chose to be selective about these items. This is not completely unexpected IMO, as cross-platform availability of all items would be too good to be true.
