I think, to a degree, the growth in popularity in the language — coupled with the perceived value of whichever changes the current Go team won't make — will determine the viability of a fork.
If the popularity of the language grows enough, there will inevitably be new companies and ecosystems reliant on it and those interests may eventually band together to create forks they think bring value to their businesses.
Outside of that formula, forks will almost always remain niche and without significant investment.
If the popularity of the language grows enough, there will inevitably be new companies and ecosystems reliant on it and those interests may eventually band together to create forks they think bring value to their businesses.
Outside of that formula, forks will almost always remain niche and without significant investment.