I recall manganese nodule "mining" from the TV back in the 80's, might even have been the 70's, maybe Tomorrow's World on the BBC - sounded like it was pretty easy back then, just a big underwater vacuum-cleaner, basically
But indeed, deep sea is hard, very similar conditions to space
Things that were once impossible become possible.
The question is always have the stars aligned such that something once impossible has become possible? I use the term "stars aligned" in the roughly technical sense: The conjunction of a set of trajectories relevant to a particular outcome. In the case of deep sea mining, that would include things like the value of the minerals, the pace of robotics development, and so on—but I’m really trying to communicate a couple of points on the general case.
It makes me skeptical of @StealthP3D’s approach to assessing innovation when he says:
Deep sea engineering is hard. ... It needs people with industrial/marine/mining engineering experience on an appropriate scale. ...
... A quick search shows BIG is an architectural group but I can't see they have industrial/marine engineering experience. This seems like the type of project that needs a lot of another kind of expertise, especially in the early stages when they are designing the method.
It is often, usually even, folks from the "outside" that drive transformative innovation. Experts very often view probable progress in their field linearly—meaning too conservatively—including engineers, especially those in a group. Elon Musk did not get an engineering degree; neither did Steve Jobs nor did Bill Gates. This is not news.
What is?
Experts are likely not becoming (much) quicker to appreciate the changes in an innovative landscape, yet these landscapes are changing (much) more rapidly. This suggest to me that investors will need to look even more often to outsiders—especially in those early stages.
Also, it behooves us to show a little compassion when dealing with innovators and their innovations. I’ve been on the side of an "outsider" advocating this idea or that innovation: That is hard especially when facing engineers (or a spouse) being "skeptical" or "practical" or "realistic." It can drain the life out of you because, as they say, if many get it, it’s probably too late.
I’m
not saying to go easy on people’s ideas (I’ve also been on the other side—evaluating innovators and ideas and quite a few). I’m saying be mindful of what they are expending and investing when they are speaking to you. Try to give them something in return (you can give a little energy back, maybe some encouragement or gently plant a seed for a change of direction), particularly because you’re not going to invest/participate in the vast majority of cases.
We need all the innovators we can get after all. We can all can become better investors as well better participants in the innovation ecosystem.