‘I’m proud of being a job hopper’: Seattle engineer’s post about company loyalty goes viral

I had one job where the company gave annual 401k lump sums based on profit. Some of those deposits were upwards of $20k. No company before or since has boosted my 401k so much.

If the new company also matches, it'll probably make you more money than staying, because the max match is reset. If you really game it you might max out the match for both companies in the same year.