In my POV:
EB/MM decided to design and sell a state of the art bass, and Bongo, with its
Neodynium pups, and low-hi mid eq, among other features was IT.
Now at first glance, a lot of players freaked at the shape, and dissed it, un-played
because it looked unattractive to them. (Kinda like the Parker Fly). Perfectly cool to not like something, but
play the thing first, and don't whine because it has a basswood body, instead of "highly figured coco-something or other". Tonewood counts a bit, but the sound comes from fingers and brain and soul primarily. The state of the art electronics on this bass (and the other MM's) really define what you're saying....
Anyway, as I see it, as time passed, players played this bass, and found that like the Ray and the Sterling, it was a first rate bass, taking the bass sound to the next level. If you've ever seen MM in SLO, you know its a large custom- quality shop and the people there know what they're doing and turn out QUALITY
bass guitars.
So I think Bongo is going to be around. I don't have access to the sales figures, but it seems to me that they move pretty well. There's a 3-month wait I understand if you want to order a color that isn't hanging on the dealer's wall.
I played one, and intend to purchase a H-SC 4-string as soon as feasible.
I think they rock, and will join the Stingray and Sterling as one of EB's stable.
(Note.....offer a HSC and a maple 'board Please......

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