also Delta Sky Club Memberships (that were active as of March 1, 2020) will be extended again for Members to enjoy through June 30, 2021.
https://news.delta.com/delta-extends-loyalty-benefits-further-2021-offers-more-flexibility-award-travelEffective immediately, Delta is making the following permanent changes for travel within the U.S. (including Puerto Rico and U.S. Virgin Islands):
Eliminating the $150 redeposit fee to cancel an award ticket and the $150 reissue fee to change an award ticket for all SkyMiles Members. This covers travel on all tickets, excluding Basic Economy fares.
Allowing changes and cancelations on award tickets before departure for all SkyMiles Members, excluding Basic Economy fares. No longer will changes and cancelations made within 72 hours of departure result in the loss of miles on domestic award tickets.