Depends a lot on the type of software you're doing. Startups will have hungry people willing to learn, more traditional companies won't in the same percentages.

Not all people are curious, they go to school, learn to code and work their job like a normal 9-5 blue collar worker. They go to company trainings, but they don't read Hacker News, don't follow the latest language fads or do personal software projects during nights and weekends. It's just a day job for them that pays for their non-programming hobbies.

I've had colleagues who managed the same ASP+Access DB system for almost a decade, with zero curiosity or interest to learn anything that wasn't absolutely necessary.

We had to drag them to the ASP.NET age, one just wouldn't and stayed back managing the legacy version until all clients had moved to the new stack.

...and I just checked LinkedIn, the non-curious ones are still in the same company, managing the same piece of SaaS as a Software Developer. 20-26 years in the same company, straight from school.