It's not on anything like this scale, but I recently acquired (sort of by accident) a Revox A700 reel-to-reel tape deck from the mid-1970s. Even though it works, it could be the most useless object I've ever possessed. It only does one thing (I guess two if you count recording and playback separately) and that thing can be done with higher fidelity by a free smartphone app. It weighs 25kg, draws a lot of power, is fiddly to use, and is probably one of the most complex pieces of consumer electronics ever made in terms of the number of distinct components it contains that can fail. What is the purpose of it, today?