I'm sure people planning to invest for only 1 year of their lifespan and began their investment journey exactly 1 year ago and who are in the process of selling everything they own today never to invest in stocks ever again will find that Nasdaq one year performance very useful information!
NASDAQ is famously overweighted in tech. It saw an 80% drop in the aftermath of the dotcom bubble, while the S&P500 only had a 40% drop. It's a double edged sword, with the AI boom it's benefiting, if that reverses it will fall proportionally to those gains.