OK, you've dropped the second-party hardware argument and "standard issue" defense, so I guess we're getting somewhere.
As for "different enough formats"...
The TurboGrafx architecture already had substantially different formats, but no one denies that CD's are TurboGrafx games. Sure, format is a convenient way for collectors to subdivide their checklists (I like to keep my Sega Cards and HuCards separate), but differences end there. If we're going to measure the extent of a console's library, we're talking about the processor, the architecture, and the officially licensed games. If doesn't matter if the LD-ROM didn't get much support or if laserdiscs look weird or if an extra licensing deal was involved in the hardware or if TTI tanked before they could make some kind of RAU-30 for the Laseractive. The fact is the TurboGrafx saw more media formats than any other system ever. Technology changed a lot in the late-Eighties/early-Nineties. Get used to it.
I don't think I actually disagree with you in principle. I think our arguments are strictly semantics.
They're part of the TurboGrafx architecture. And if you're collecting everything for that architecture I agree they should be included.
The issue here is that the format of the LDROM2 is only playable on the LaserActive which I see as a seperate device from the TurboGrafx 16 itself. While it has a PAC that enables the full functionality of not just a TurboGrafx but a Turbo Duo, I see it as being a separate format due to the reasons I've elaborated on over the past few pages.
My opinion on this really hasn't changed. There's basically collecting for the whole family/architecture, or just games that can be played on the original TurboGrafx 16 that are at the root of the do LaserActive games count question.
Added in Edit:
So the word TurboGrafx can have two meanings. TurboGrafx the architecture/platform. And TurboGrafx as in TurboGrafx 16 the original hardware system.
A complete collection of the first encompasses everything. The second merely encompasses having every domestic playable title that will run on the original hardware.
Based on that I divide them up, but anyone is free to use whatever methodology they choose.