Uncomfortable/unpopular reasons:

  1. More money, companies are throwing money at engineers
  2. Companies are having trouble hiring and it's getting easier to get a job
  3. Inflation concerns, need more money
  4. Most jobs suck (I work at 4 companies now and have worked at 30 companies in my 10 year career)
  5. Retiring early, read reason 4. Working for a company sucks.