You mean the accomplishments of Kunihiko Fukushima.
Yeah I know. Tbh, we've all seen the video and that is really what Yann Lecun is known for. That was his big contribution. He did not come up with it, he coded it up. Great accomplishment, but ... I get what you mean.
Mmh he is also known for clear thinking and teaching. As for past/present/future worth, I think you're just being ageist, can you show your work maybe, what are you working on to get to that "past accomplishments" burn some day?