"I've only been making records since 1991. When you look at the long-standing careers of people like Joni, it's not very long!"

In this quote, Sheryl Crow is assessing her reasonably brief profession in the music market. She mentions that she has only been making records since 1991, which is a fairly short amount of time compared to other artists who have actually been in the market for decades. She particularly mentions Joni, probably referring to the legendary singer-songwriter Joni Mitchell, who has had an enduring and effective profession in music. By acknowledging the durability of Joni's career, Sheryl is highlighting the truth that her own career is still in its early stages and she has a lot more to accomplish and discover in the years to come.