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They could be "not up to" because of lack of resources, probably time and/or money. I think that's what is implied, rather than lack of technical knowledge.

I got the sense that they meant "not willing" but I agree that's one of those English phrases that can easily be misconstrued towards the more negative interpretation.

That said, I love the detailed post and the interesting solution, and the commitment to performance!

Yes I assume the author meant “not up for”