If someone would make an inexpensive bullpup 9mm PCC. It would offset the size since all it would need is overall length requirement and it would retain a close handling of an SBR while still being useful. And when I meant inexpensive, I mean just that. The Tavor and X95 are cool, but those are really pricey guns and even more so to convert to 9mm.
You can buy a factory 9mm Tavor so no additional cost to convert are necessary.