For ISB applicants, is it better to apply now or wait for a promotion, stronger role, or more work experience?

For many ISB aspirants, there is a difficult choice between applying with the current profile or waiting another year to build stronger professional experience. A promotion or better role could strengthen the application, but delaying the MBA also means giving up another year of career growth and potentially delaying a career switch.

How much difference can a promotion, increased responsibilities, or a better role actually make in an ISB application? For those who have applied or are planning to apply, would you recommend applying early or waiting until the profile becomes stronger?