Looks like True BASIC, founded by Kemeny and Kurtz, is suffering from similar problems allegedly affecting PowerBASIC (Kurtz has not passed away but he is 90 years of age and I expect he does not have much involvement with True BASIC these days).
That is, development of True BASIC version 7 has been affected by the age, complexity and lack of documentation of the source code from version 5 (looks like the DOS version, which is still available, is better documented).
Development of version 7 looked on track until about 2014 when things seemed to go south; not sure why there was a lot of confidence in developing v7 up until then?
They have managed to date to keep it going, so let's hope that they can continue to do so; it would be a shame to see the demise of yet another BASIC, especially one with such a pedigree.
At least a new book on programming True BASIC has been released, which gives one hope that there is a future.
How easy or difficult is it for a software house to employ someone competent enough to be able to pick up development of legacy software such as this?
Anyway, I plan to purchase a copy of True BASIC to show my support.