My sister grows tatsoi in Indiana, colder than here in Georgia, but significantly warmer than it used to be. She grew hers through the 2021-2022 winter.
That never would have happened in the indiana winters of my childhood and young adulthood, when we expected several days of -18 C or colder, and -25 C was considered quite cold, but not unusual. Record cold there was -36 F (-38 C) just a few miles southeast of where my family lived.
I'm surprised at the range for broad beans, from -4 C to -11 C (Aquadulce Claudia somewhere in the middle).