"World class Product design/management and a fresh crop of A-list engineers could build successful niche products atop a select set of existing Viya components. Would take some tweaking but there is a lot of good infrastructure there."
That is positive wishful thinking!
Realistically speaking, your idea requires an investment above and beyond the fruit that Viya has thus produced. The unfortunate reality is that most of the Viya fruit is rotting on the ground because customers simply do not like the taste of it. If the founders are committed to selling, they are not going to have much interest in spending money for water and fertilizer to invigorate a dying Viya tree. The best hope is for a buyer to see the potential of your plan...a beat case scenario. And the problem with that scenario is that most buyers will only want to pay for the declining v9 revenue stream.
Bottom line, the founders need to adopt the same mindset as the typical buyer. That likely won't be easy change for them to come to accept, simply because they have not thought that way for decades. If they can not or will not have that change of mindset, then SAS won't sell before they pass away. And once they pass away the heirs will have an expeditious estate sale and SAS as we know it will be forever gone.
The remainder of this year will be very telling. If little changes are made, expect that estate sale to become an increasingly likely reality. In crude terms, SAS is at a po-p or get off the pot moment.