I think that developers switching companies is a symptom of our industry as a whole, not WordPress or remote specific. At my agency, we see workers who stay on for 20-30 years and those that leave within 3 years. Most that stay beyond the three year period are here for most, if not all, of their professional lives. But there is a threshold that many cannot tolerate or simply won't. There are a plethora of developer jobs out there and if you are simply looking for pay and benefits, there's always someone paying more.