Bill, have you got one of the older Wersi's that CAN'T be upgraded to the latest OAS? Tell THEM that they are future-proofed, why don't you.
And, you missed the point so completely about the hardware aspect, I am going to try again. It's not that THESE older standards are available on the current set of MOBO's. It's that NEXT YEAR, something will probably come out that blows it all away. So much for 'future-proofed'. And modern VSTi's leverage the extra power modern chipsets have. Try running Omnisphere on a ten year old computer. Try running the Arturia stuff on even a five year old computer. Try running next year's hot VSTi on last year's computer.
You change out all the innards, how is this different from simply buying a new arranger? Even if you retain compatibility with the new hardware and the old OS and software, you have still spent quite a bit to be 'future-proofed'. I can sell an older arranger for not THAT much less than the new one costs. Both seem viable options, and may not be THAT different in price to do, if you need a total changeout.
And, I tell you what... THIS time around, perhaps you could TRY to remain civil to me when you disagree? Or should we all go back to the bad old days? I'm game if you are!
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An arranger is just a tool. What matters is what you build with it..!