Hi Tom, Steve, et al.
To echo what others have said, Samplitude Access provides the greatest amount of accessibility by far, seems to have the most users, at least English-speaking ones, and is the result of tireless efforts on behalf of first, Tim Burgess, then, Steve Spamer, Phil Muir's documentation, Lenn's beta testing and audio tutorial production...
It represents an ongoing team effort I doubt you will fine elsewhere. Take a look at the level of accessibility it provides, compared to other solutions, the quality documentation, the audio tutorials being produced, the vibrant mailing list and Whatsapp group where users can receive help and have their questions answered... Does this level of accessibility and community support exist for blind users of Samplitude elsewhere?
As for combining various access solutions, at least two years of constant work has gone into Samplitude Access, so unless developers of other solutions are willing to lend their talents without trying to unduly influence the direction of the project, I think some sort of group effort is a bad idea. Too many cooks spoil the soup and all that. I would never presume to speak for Steve, our valiant Jaws scripter, but he would probably love to work with other talented Jaws scripters, as long as they are willing to put their pet projects aside and help out.
I'm an ex-Sonar user who came to Samplitude Access, hoping it would provide similar functionality to what I was used to with sonar. It exceeded my expectations by a wide margin! I can confidently and independently record, mix, or master a project, from start to finish using this accessibility solution. I have never have this degree of control over my work, always farming out at least some of the process to sighted folks.
I hope Magix decide to back the right horse in this very small race, help us further integrate our solution into the product, and even, one day, become screen reader agnostic, able to work with both Jaws and NVDA.