New design with XC9500XL CPLDs, is it already obsolete?
I would say your answer is at the top of datasheet. This series seems to be end of life, and as some of the comments mentioned, it was long in the tooth 10 years ago. The only one that might still be active is automotive, but that's a different supply chain.

The other thing that happens beyond just the software becoming incompatible with modern OSes is that the physical programming tools become incompatible. Or, at best, something you have to bodge together with OSS stuff. This may or may not be worth the time investment on your part, depending on the support profile of your product.
My vote: find a more modern part, or one with a very solid OSS community around it.