I have been thinking the same thing lately. I have projects still operating that were created when I purchased a license for ListX.. I need to make changes and have been seriously considering changing everything to XMod.
A couple of things to note: OWS IS open source, that was one of the things that happened when it changed from ListX to OWS. You can download the source from this site. (Which I have done, but do not have the skills to do much with it.).
I see a number of things that need to be done and have been trying to decide how much I want to get involved. The OWS website needs major help, there are tons of broken links, particularly in the forums, navigation is often a problem, there is no longer a samples repository.
I was considering approaching Kevin about possibly taking over webmaster duties for the site - I would even host it if needed.
The documentation is in serious need of help, including updating, adding examples and restructuring a lot of the sentences, correcting grammar, etc. (I occasionally edit some of the WIKI articles, just to correct grammatical errors and make them more readable when I need to understand something) Even the link to contact Kevin for paying work is broken. ( I tried a few days ago). I'm not even sure that he didn't get hit by a car or fall off a cliff in the last year.
I think OWS is one of the best modules created for DNN, and I am a big believer of open source which is why I have stuck with it for so long. Support, however, is a major issue. The latest post I can find that Kevin made in the forums is over a year old and his (or anyone's) last blog post is over five years old.
When there are new versions (Thankfully, he still is keeping up with DNN Changes), there is little or no elucidation as to what changed, what is new, etc. For example, there are two current versions, one for RAD editor and one for "Standard" editor, but neither seem to work when it comes to WSYWIG Text boxes. Either that or the 7 year old documentation is no longer valid.
I'd like to support Kevin in this project, and I think that there are plenty of others who would as well. It is a masterful piece of work and if we can relieve him of some of the work associated with it, things will be better for all of us. Perhaps there is some way that a core group of OWS users would be willing band together in a working group to provide better support and maintain the project's viability.