"If you're not moving forward you're moving backward."

It's true for any company, and even more true for tech companies. They have to continue to grow for many reasons, including keeping their existing products better.

I personally am not a JIRA fan. We used it for a while and it just really didn't work out for us. The entire experience was too cumbersome and unfriendly. However, that has nothing to do with them growing. If anything, they're doing an amazing job growing with a product that isn't fun to use at all.