Thanks for the helpful answer. What was the specific niche it was filling, and why is it not practical for other cases? Or if you don't feel like repeating this

Thanks for the helpful answer. What was the specific niche it was filling, and why is it not practical for other cases? Or if you don't feel like repeating this info for the zillionth time, is it explained in an essay or blog post somewhere? My googling turned up little.