History in general is useful, however, I just do not see the benefit from a forecasting perspective where we are trying to understand the upcoming patterns (this forum). I would personally 50 years is ideal, as I am seeing a lot of the 1970s, 80s and 90s repeat since 2018 (actually lived through 80s onward). I don't see how stating "this cold would have been above average in 1923" will help us do a January forecast.
There is a separate climate change forum where past information is highly relevant and should be discussed, as it can help us prepare for continued change (unless it stops or reverts).