If you can't live on 4 mil NOW, you have a problem. In the future, you may well need more than that.
For example, how many of you could retire on $157k? Basically no one in the U.S.? Someone in 1850 would have laughed at not being able to retire on 157k, as that's equivalent to the 4 million today.
We laugh now and say of course you should be able to retire on 4 million, but one day it will be almost impossible, as that will be only a few years' salary.
In any case, having 4MM now (or in the near future), yes, should be WAY more than enough to retire on, unless you have a spending problem.
/start tangential rant
Free Money Finance is one of the worst financial blogs I know of. Yes, the CNN article is to blame for the 4MM misconception, but his "commentary" is 3 short statements about that 1) inflation sucks 2) a commenter before said inflation sucks and 3) he'll talk more about it later.
What a ridiculous "author"
/end rant