[The] Spectrum rep was promising a new kind of a la carte streaming service, officially called Spectrum TV Choice. For $25 per month, he said, I could get all the major broadcast networks, plus my choice of 10 other cable channels, all streaming on mobile devices, web browsers, Roku players, and Xbox consoles. While I personally have little interest in becoming a Spectrum TV customer—I’m happy with my combination of Netflix, Amazon Prime, HBO, and an antenna—this was a rare opportunity to try something truly new from the cable guys. Spectrum’s a la carte TV service is a good value,...