The development of Ethereum1 is at a halt. Berlin hard fork was scheduled for June, but postponed to next year.
Core Developer / MC Masher November 6, 2020 https://twitter.com/hudsonjameson/status/1324772025886494720?s=20
Against November 6, 2020
According to Hudson Jameson, this is false. "Berlin was never officially scheduled for June and EIP-2537 isn't needed for Serenity."