SBF was going to testify. He was going to do it remotely.
My issue is remotely was not an option before the pandemic. It was allowed during the pandemic for good reason, but now that reason doesn't exist anymore. Therefore, remote testifying should not be allowed anymore either...
Congress can legally compel you to appear - but they cannot compel you to say things against yourself (ie. incriminate yourself). You still have to show up... but you can just refuse to answer.