I'm sure I heard a much higher figure recently but 2000 UK employees surveyed gives 40% looking to change job this year - https://www.thehrdirector.com/business-news/jobseekers/chang.... That doesn't necessarily mean they don't love their work, most dissatisfaction is with bosses usually in these surveys, but it's certainly an indicator. Loving your work and not loving your job also leaves you more likely unhappy too, or at least malcontent.