It helps investors because the 180-day deadline got extended again; it's now March 31, 2021, for any 180-day period that would've ended between April 1, 2020, and Dec. 31, 2021. This reopens the period for reinvesting certain gains incurred in the calendar year, 2019. The 90% test accommodation was further extended to June 30, 2021, and the working capital safe harbor was extended again as well. The relief the IRS has granted here is quite generous, especially because they granted relief twice.