With thirty security fixes in Chrome 59.0.3071.86, I would expect Google to emphasize the need for users to update as soon as possible. Instead, the release announcement says “This will roll out over the coming days/weeks.” Presumably Google feels that the fixed security issues are too obscure to represent any imminent threat.
To be fair, personal experience has shown that Chrome is great at detecting updates, often very soon after they become available. Visiting the About page is usually enough to trigger an update. Click the three-vertical-dots menu button, then choose
If you have several hours to kill, you might want to check out the change log for Chrome 59.0.3071.86, which by my count contains 10,911 entries.