I am not against having some old instruments around, I still have my OBMx, its about 20 years old now, still going strong, still being used. But it has value to me like your Matrix 12 does to you. Things that don't have as much personal value, like my Prophet VS, which was a nice synth that I enjoyed, I had to weigh the advantages to the possible disadvantages of keeping it. I decided that I didn't enjoy the interface that much and with some parts now being unumtanium I decided it was maybe time to let it go. The Prophet 12 seemed like a good trade off, as it has some of the VS type sounds with more knobs and a more modern package. Hey and it has a warranty.
Anyway, I think I took exception to your subject title that analog isn't quite there yet, and your example to me was kind of strange as to why it isn't. The 4/8 voice was a quirky interim poly synth that wasn't quite there itself! And once the Prophet 5 showed the way, Tom dropped it and came out quickly with the OBX, and no one complained one bit back then.
And I have to say if contemporary analog isn't quite there yet, well it's a lot closer then it was just a couple years ago. So give it a couple of more years, you might be surprised.
Also, when I was at the NAMM show last January I was talking to Tom and the others at his booth, they basically told me, if you want to recreate an old 4 voice, to buy 4 SEM eurorack modules when they come out, that would be the quickest and easiest way to do it.