A host can create more content for their audience by live-streaming episode recordings. Streaming is an opportunity for a host to strengthen their relationship with listeners. A host can answer audience questions and give them an inside look into the podcast.
Many people want to start a podcast and feel they need a co-host or to interview someone to start one, when they cannot find someone they give up. There is no need for a co-host or interviewee but a solo host needs to prepare more before recording.