We had an unusually cold day or two this winter (zone 8, bordering on 9) when
it went down to -9 C.(it usually hovers around freezing or maybe 2 or 3 degrees
below).

I lost a large Rosemary bush, and I guess I had forgotten that it was a bit
tender (others in less exposed locations came through without blinking).

Do people in less clement areas normally keep Roesmary as a pot plant?