Sure, there might be an employer match, and your money will maybe grow over those 20 years, but unless there's a generous match and your portfolio grows, a lot of that gets eaten up by the 20%-30% taxes you're paying on that extra $40K you need to save. I mean, market returns were good between 2009 and 2019, but beating that tax burden of 20%-30% a year is pretty damn hard.
Also, your money might now grow over those 20 years. Especially the next 20 years. I don't think anyone has high hopes. "Past performance is no guarantee of future results". C.f. public sector pensions, which receive extraordinary protections and pay out the same whether the market is up 5% or down 30%.