There are almost no people left who dedicate their professional career to one employer. The dynamic job market, the changed lifestyle and especially the perception of the generation of parents who did not leave the workplace until retirement, shook the concept of "career" Still, there are many organizations that actually encourage the growth and promotion of employees within the organization.
Seniority at work in the worlds of industry is often longer because of the few options available to employees, which keep them in the same place for many years. It is easier and more convenient to leave because you know there is a secure livelihood.