I asked about when Intensity Shuttle for Thunderbolt would be supported in Big Sur and I got this answer, which in fairness, was lame.
In regards to your query about the Desktop Video software for Intensity Shuttle for Thunderbolt,
being supported on Big Sur Mac OS, currently, Desktop Video 11.6 supports the following:
10.14 Mojave.
10.15 Catalina
Hope this suffice the query at hand.
Nope, it doesn't suffice the query at hand, not at all. Maybe they've end of lifed the product or are going out of business.