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Not sure about this one example but working in the industry and following the development of wing sails the ones I’ve seen will fold one way or the other. This example in the article is probably a prototype or even experimental implementation to test the efficency.
Examples of folding sails in development: https://www.theoceanbird.com/oceanbird-wing-560/
Running sbc at higher bitrates than default sound subjectively better than most existing codecs. I use 552 kbit/s regulary and it sound great. Unfortunately the support for higher sbc bitrates is terrible.