How would that keep the company in business to provide support? Seems like the same outcome, to me.
My understanding is that copyright law is meant to allow a company to profit off its ideas for a set period of time, in order to recoup R&D costs. Then, if the company no longer has the means to profit off the IP, and won't sell it to another who wishes to make the IP available, the IP should become public domain.
Maybe it will push these companies to make support easier as well, and Open Source parts of it where it makes sense to.
On another hand. Lifetime support of technology (say 50 years) is damn expensive. Let say you need a dozen of engineers (hardware + software) + doctors to keep it going. It's 12 people * 200k salary (if you don't like this number, pick your own) * 50 years = $120M.
I think you can potentially argue that you don't need a dozen people to support this. However, I think it's a fair number to support aging hardware + software.
Unfortunately, such things work only with a scale. You need 10 people to support 100 customers, 20 people to support 1000 customers and 40 people to support 10000.
If they got to 10000 customers, I could see them getting enough money to fund such trust. Having just 300 customers won't be enough.
Looking at the crunchbase (https://www.crunchbase.com/organization/second-sight). They whole funding was $130M.