I love hamburgers and for me, it's the biggest loss after becoming a vegetarian. Impossible is the closest I can get to recreating that experience.
I switched to vegetarian because of the animal suffering/morality angle. I have for a long time felt that it was the right thing to do, but I liked eating meat so it was hard for me to do it. The pandemic gave me an opportunity to make the switch and be more consistent.
While I strongly agree with the angle of minimizing animal suffering, I am also pragmatic because I grew up in very rural agricultural communities. All large-scale agricultural kills loads of animals, that is the nature of the thing. When you buy plant products that carnage is merely less obvious and a bit more wasteful (the animals that die usually aren’t eaten by people). Feeding 8 billion people and animals dying go hand-in-hand, even when everyone is vegetarian.
It fits a weird market niche. I think most people that buy it would be better served with really great (non-fake-meat) vegetarian food and the occasional bit of quality meat when they really want it, which would provide a superior eating experience all around and approximately achieve many of the same objectives. I don’t know any vegetarians that really eat the fake meat; most of the people I know that eat it seem to treat them as “offsets” for when they eat real meat.