Outdated compared to what, exactly? Whether it is "current" or "outdated" is in your (or my) head. If people are prepared to pay money for it, it isn't outdated, no matter when it was originally coded.
The reasons for MG to continue to develop the old engine was to make money. I suspect, however, that Oleg is more of an aeronautical physicist than businessman, and there was no fun left in the old engine for him to do his tweaking - that's why the engine has been declared "outdated", and a new one declared necessary.
I hope SoW gets finished, and I hope it does make Il-2 pale. But that doesn't mean that Il-2 was stretched to its greatest commercial or technical limits. Because it simply wasn't.
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