Through the years I have noticed that (most) permanent employees build a bubble around them. They stop working for the end-customer but they end up working for themselves. Create a comfort zone and then build amoat with crocodiles around it. Some people (like the author) wake up from this slumber and change this. The £€¥$ may be good, but work stops being excited. I used to change companies every 4-5 years just because of that. After the 1st-2nd promotion you are part of the "political" landscape and need to join a clique or another.
(Imho) 7 years is a long time to be working on the same topic, in the same company, moving only vertically.
(Imho) 7 years is a long time to be working on the same topic, in the same company, moving only vertically.