Recently mamedev decided to add support for the newer Cave platform in the main build, in my opinion this was too soon since this opened the door for emulation of games that are very recent (2010). More recently they received a letter from Cave asking to remove any support for that driver, they complied. Which means this driver is now officially out of mame for at least the next few years.
I have been asked if I will include support for this driver in future versions of shmupmame, the answer is No. First of all, the emulation is not accurate at all due to the speed hacks used to make the driver fast enough and also because the latest games on this system are still way too recent.