The Forester was able to pick and choose some of our best engineers to work on Viya. For this reason, I absolutely believe it performs fast.
I believe Viya has two possible markets:
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SAS users. It can’t be sold to these people, without convincing them to make an expensive investment in migrating their existing SAS code. Many will not pay this switching cost.
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R and Python users. Here it competes against infrastructure that is free or cheap. Many will not pay for Viya infrastructure.
So I believe that Viya performs fast, but is not selling fast, because it faces price barriers in both markets.
In the SAS market, the price barrier might be removed by making Viya 90% compatible with SAS. There is evidently an ongoing effort at this, though other posters have called it a hard problem. And as others have pointed out, some SAS users will never switch, because they run SAS on departmental servers or PCs that can’t benefit from Viya.
In the R and Python market, the price barrier can't be removed. But some users will pay well for fast performance — big banks, for example. The suggestion by other posters to rearchitect SAS/Fraud and SAS/Risk on Viya is evidently being implemented, and I expect these products will sell.
Please correct me if you know better. I believe Viya can target two partial markets: SAS users who can benefit from a modern architecture, and R and Python users willing to pay for performance. Users who run SAS on departmental servers or PCs require a separate product that shares code with Viya.