That depends on what space you are in. In an embedded space 5 years can be half way through a products lifetime. You usually have something fairly close and m

That depends on what space you are in. In an embedded space 5 years can be half way through a products lifetime. You usually have something fairly close and mostly done in 1-2 years. But the next 2-3 years is finding out all sorts of quirks in a real world physical environment. I stayed at one company for about 20 years. Every 2-3 years the job would radically change into something else. So I stayed for awhile. It was good for them as they could come back to me for odd decisions made and how to work around them, and for me I could work on new tech every few years. But for me on ye-ol-resume it looks like 20. My current job things are not changing like that so I will need to move on to get diff exp in something else now. The org is just not designed in the same way and it would be easy to silo yourself into a niche that melts in 10 years. You can argue with your boss to you are blue in the face about moving on and getting more challenging/different jobs. But at the end of the day they need to ship their product and they will usually not look out for you.