Also you have to watch out for those expense ratios. I once worked at an employer where the only funds available in the 401k plan had expenses and fees around 2%. Managed mutual funds statistically perform no better than just cheap index funds. So paying those fees doesn't actually earn you a higher rate of return. But plans with usurious fees are cheaper for employers to provide.

What was so egregious about it is that when I ran the numbers, I found that my employer's 401k plan was actually worse than investing in cheap index funds in a regular taxable brokerage account. The 401k could be contributed to with pre-tax money, but all the tax benefits were cancelled out by being trapped in high expense 401k plans.

I contributed enough to get the match and invested any money above that elsewhere.