Could also be true. But the second generation technology is what is expected to be the main treatment (afaik). And it seems that they are also developing the third one, so why couldn't it be the case that the first one is also still in development? Also, they are talking about DISTINCT technologies. So the third one is not an upgrade of the first twoI think the poster on HLC2020 is wrong. He interpreted it as each of these treatments is an option depending on norwood (which it never explicitly says). I interpreted it as, they are all methods they have researched previously, but are moving forward with their method which had been researched for the past 8-10 years.