My personal guide boils down to this: 100 soft/best effort limit, 120 hard limit (with exceptions), 150 absolute limit (rarely used), 72 limit for docs/comment

My personal guide boils down to this: 100 soft/best effort limit, 120 hard limit (with exceptions), 150 absolute limit (rarely used), 72 limit for docs/comments. Auto-formatters usually set to 120. More than 120 does come up, but very rarely - e.g. long URLs in documentation.