Skyblivion is slated for release sometime next year. They both released a progress video a couple months ago. Skywind is a little more dubious, there's a different group of people working on it and I think they had to scrap a bunch of stuff at some point but it's overall like 70%~ done, some parts like quest implementation are close to 90% done but there's other areas that are seemingly moving at a glacial pace and it's probably realistic to expect it all to take a few more years at least.
So basically never too, since those are being worked on forever with no finish in sight.
Skyblivion is slated for release sometime next year. They both released a progress video a couple months ago. Skywind is a little more dubious, there's a different group of people working on it and I think they had to scrap a bunch of stuff at some point but it's overall like 70%~ done, some parts like quest implementation are close to 90% done but there's other areas that are seemingly moving at a glacial pace and it's probably realistic to expect it all to take a few more years at least.