Why employer match changes the picture
Employer match can materially improve long-term retirement outcomes because the extra contributions compound for the same amount of time as employee savings.
That is why even simple 401(k) examples are useful for comparing the value of saving enough to capture more or all of a match formula.
What this simplified 401(k) example leaves out
The model does not adjust contribution limits, salary changes, vesting schedules, taxes, fees, or changing employer-match formulas over time.
It should be treated as a planning scenario rather than an exact workplace-plan forecast.