This is terrible advice. Great that it has worked for the author but it does not mean it's a good idea for everyone. 2 weeks is the standard and as long as you give that you maintain good relations. Most people are not as valuable or important as they like to think they are. I have seen very important people leave / fired and things still go on. (Twitter is still working - isn't it?) Once you tell that you are leavin…
There’s a lot of merit to taking a week or two beyond the standard. 2 weeks isn‘t a lot of time to hand off all your work, go through the usual HR bureaucracy, and make sure you have contact info for anyone you might want to stay in touch with after leaving. If it’s an amicable departure 3-4 weeks can be a lot less stressful for everyone. 6-8 weeks is kinda weird though, unless you‘re extremely senior and on critical…
If you're a leader in a team, definitely give more notice. It's the professional thing to do. Something that the post -doesn't- say is that you should have a transition plan written down before you tell your boss, just in case you get cut off.
Of course they can still summarily kick you out the door, but it's a chance for you as a leader to do right by the team.