Churchill probably not the best example:

"In 1953, during his second stint as prime minister, Winston Churchill had a stroke after dinner. “No one seemed alarmed by [his] slurred speech and unsteadiness on his feet, one of the advantages of having a reputation for enjoying alcohol,” writes Andrew Roberts, a historian. For several weeks, as Churchill was incapable of governing, his son-in-law and private secretary in effect ran the country. He never fully recovered, yet refused to stand down until 1955, when he was 80. " https://www.economist.com/briefing/2024/07/03/senility-in-hi...