AutoCAD 2020 is running great, but based on the latest webinar, it looks like CADWorx 2020 isn't going to be out until Q2, so in 2-5 more months.

In the past CADWorx only supports its matching number and 3 previous releases, like CADWorx 2019 will only work on AutoCAD 2019 and 3 older, 2018, 2017, 2016.