Magnetic deviation might not have been an problem in a single year, but magnetic drift can be quite impactful even over a decade. It can be quite severe the further North you get which can really throw compass directions off. The airport in Fairbanks, Alaska changed its runway numbers in 2009 and will change then again in 2033[1]. This can represent anywhere between a 15-30 degree drift over the course of 20 years.

For anything more than a short jaunt (which you probably don’t need a compass for anyway), you would need to understand updated magnetic deviation regularly to navigate with confidence.

[1] https://www.ncei.noaa.gov/news/airport-runway-names-shift-ma...