Several timelines in other record systems have overlays of historical Events on Personal Timelines. Sometimes these Event overlays are intrusive but sometimes they can be enlightening.
If Gramps had a function to add events to Places, it would open a whole new level of analysis possibilities.
If dual-dating due to the adoption of Gregorian from Julian calenders occurred in a region during a person’s life span, I might want to show it’s occurence. I might even be able to clean up some of the conflicting records by finding records that were not dual-dated. (The adoption started in 1582 & the last European country switch was in 1923.)
Disasters (the American Dust Bowl), Regional Wars (refugees & repatriation of veterans), persecutions (French Wars of Religion, the Holocaust, the Crusades, the Four Buddhist Persecutions in China) & economic books/busts (California gold Rush, Oklahoma Land Rush of 1889, the Great Depression) were major influencers of migration.
Famines (Potato Famine) & pandemics (the Black Death, the Spanish Flu) give new insights into possible causes of death. Deaths causes were generally downplayed during epidemics to reduce panic & ‘preventative’ violence against the quarantined.
It probably wouldn’t be necessary to do more than add the link an Event to a Place as a 1st step.