First of, vegetarianism means not eating meat while veganism means not using animal products including eggs, honey, milk, leather, wool, etc. As someone else noted, apparently Wikipedia and other sources state there's a difference between vegan diet and vegan philosophy. Although imo if you just do not eat animal products but still use leather you're just following a plant based diet while not being vegan. Like some pro athletes, they have a plant based diet just because of sports and health, not because they care so much about animals and/or the environment.

But in the end it's just a matter of labeling. I don't really care about that, or whether people become full vegan. A sling as people become more aware of what they consume and reduce it a bit, that's already a win imo. People should find the way which works the best for them.

I'm would be a full vegan if not for one thing: cheese. I have barely no non-sugar alternatives to put daily on my bread so I still consume some cheese (which technically isn't even vegetarian). This works for me. Anyone who doesn't like it can suck it, I do so much but I need this thing in my life.

Some vegans might eat lab grown meat because it would fit in their life philosophy, some wouldn't. It all depends on why people chose to be vegan and what they are comfortable with.

I have no interest, as since I became vegan my meals have become so much more flavor rich as I'm using more herbs and spices and create my meals with more care. I'm fine with what I eat. But I think it's a nice development as meat eaters can continue what they do but more responsible and ethical.