I think there is something positive for both options – long term or frequent change. Being in the same company for many years I now clearly see the effects: my knowledge is considered in many projects and I am very often to go-to person. At the same time I can also see the benefits of bringing in people from other companies – new ideas, new points of view. Therefore I think for a company it is good to have a healthy mix of both.
Your personal choice to switch should, from my point o view, not be dependent on trends. If you like your job, your contribution is valued, you have development opportunities, challenges, nice colleagues and a nice boss – why should you change!
