That's the normal stickiness of a job, but if you are a junior and you've levelled up to senior you'll likely be looking at a wide number of roles far more than a senior staying still.
Some things are easy wins for retention -- my company gives extra holiday as tenure extends for example, and people of a certain age still have a defined benefits retirement plan which has significant value. The extra holiday costs companies nothing, but an extra day each year really helps, start with say 28 days, but after 5 years you're on 33 days. It's harder to put a monetary value an extra day off, so harder to make the jump-ship calculation.
Some things are easy wins for retention -- my company gives extra holiday as tenure extends for example, and people of a certain age still have a defined benefits retirement plan which has significant value. The extra holiday costs companies nothing, but an extra day each year really helps, start with say 28 days, but after 5 years you're on 33 days. It's harder to put a monetary value an extra day off, so harder to make the jump-ship calculation.