I've been a consultant for about half my career and had runs of 8 years and 4 years (where I am now, so at least 4). Sticking around is harder, because there's a adrenaline rush of getting up to speed and knocking off the low hanging fruit, not to mention the salary bump. But sticking around is more rewarding in terms of long term impact, imo.

In fact, I wrote a blog post about the joys of sticking around: https://letterstoanewdeveloper.com/2023/08/07/the-benefits-o...