From the Bank of America Merrill Lynch US Economics team:
Net worth has recovered, or has it?: After collapsing in 2008-10, net worth is booming again and has now surpassed the 2007 peak. A generous take on this is that the dollar value of wealth has now fully recovered; a more realistic interpretation is that wealth as a share of income has been flat over the last 14 years. During this period, boomers moved out of their 40s and into their 50s. Saving and wealth gains should have been unusually high as they set up for retirement; instead they are running in place.