The hit series “Bridgerton” has set off a string-quartet boom

With vibrant costumes and focus on the marriage market, “Bridgerton” positions itself as a modern period drama. Viewers have spent almost 1bn hours watching the first season, and nearly 800m with the second, according to Netflix. The series has sent internet searches for corsets and wisteria soaring. It has also made string quartets the most fashionable they have been in centuries.