I think this is specific to certain areas of the software market. I'm in embedded systems and the engineers I've worked with generally stay much longer than 3-4

I think this is specific to certain areas of the software market. I'm in embedded systems and the engineers I've worked with generally stay much longer than 3-4 years. There's a former co-worker on my LinkedIn who's my age and she's been with the same company for over 20 years. I quit my last job after 5 years and over my 30 year career, that's the shortest stint I've had.