I love that you're doing this for free; I've done similar things in the past and learned that at some point you may be doing people a disservice by keeping old

I love that you're doing this for free; I've done similar things in the past and learned that at some point you may be doing people a disservice by keeping old systems and broken implementations alive for free. I'd call it vendor lock in by generosity. Or, tongue in cheek: had the business owner paid for support for those Sonos boxes, he probably wouldn't have them anymore.