Not exactly 100% relevant, maybe 25% relevant, but I have never enjoyed the Rumble series. In person, playing them myself, hearing other people playing them, hearing them on any recording or video. Kind of horrible... "To me." Just sounds like glassy mud, a wet fart kind of tone.
Anyway, I love the Katana guitar amps, very much, so I'm nearly on board with the bass amps just on reputation and similar experience, alone. Boss is killing the effect pedal market these days too, they have gone above and beyond with the 500 series, space echos, guitar synths, 200 series, and etc, the new releases are something else.