An interesting choice by Ian Anderson to go ahead with some recent performances even though some members of the band were unable to perform because they had caught Covid.
The show went on with audiofiles taking the place of the stricken band members.
Obviously, the current iteration of Tull is pretty much Anderson’s backing band, so in purely musical terms there may be no real loss to subbing a live performer with a digital recording.
Still, I suspect I’d feel somewhat short changed if I had a ticket to a band performance and not everyone was there.
https://jethrotull.com/tough-times-tough-choices-the-use-of-live-performance-substitute-audio-files/