Sigma Oasis on April 2, 2020. The album was premiered through a listening party on their LivePhish app, SiriusXM radio station and Facebook page. The album consists entirely of material the band had been performing in concert over the course of the previous decade, but had yet to appear on a studio release. In January 2021, Anastasio told Pollstar that the band was unable to perform or rehearse together due to COVID-19 restrictions and quarantine rules currently in place in the New England states, but said "As soon as it's feasible, we'll be back." Phish performed their first concert since the start of the pandemic on July 28, 2021, having not performed since February 23, 2020. Beginning with their concerts at The Gorge Amphitheatre in late August, the band began requiring attendees to show proof of vaccination or a negative test for COVID-19. During their 2021 Halloween concert, Phish debuted a set of new original science fiction-themed material under the guise of the fictional band Sci-Fi Soldier. According to Pollstar, Phish were the ninth highest grossing concert act in the world in 2021, with a $44.4 million gross from 35 concerts. Phish also had the fifth highest concert ticket sales in the world in 2021, with 572,626 tickets sold. Due to an increase of cases of the Omicron variant of COVID-19 in New York City, Phish postponed their 2021 New Year's Eve concerts at Madison Square Garden from December 2021 to April 2022. In lieu of the traditional New Year's Eve concert, Phish instead performed a three set New Year's Eve concert on December 31, 2022 from a soundstage they dubbed "The Ninth Cube." Phish released Get More Down, a studio version of their Sci-Fi Soldier material, on October 31, 2022. Reception and legacy Phish's popularity grew in the 1990s due to fans sharing concert recordings that had been taped by audience members and distributed online for free. Phish were among the first musical acts to utilize the internet to grow their fanbase, with fans using file-sharing websites such as etree and BitTorrent to share concerts. In 1998, Rolling Stone described Phish as "the most important band of the '90s." Phish have been named as an influence by other acts in the jam band scene, including Umphrey's McGee and the Disco Biscuits Other musicians have also counted Phish as an influence, including Adam Levine and James Valentine of Maroon 5,