HOW SHOULD I EXPRESS TO MY MANAGER THAT I NEED TO "COAST" FOR A YEAR OR TWO? (REDDIT THREAD)

Summary from the TLDR Web Dev newsletter

An engineer is dealing with serious family matters that requires them to put in less effort at work. While they want to tell their manager, commenters tell the original poster not to. Instead, they should continue working, albeit slower, and not tell the manager anything as nobody will probably notice.