It's a good guideline but I doubt few of us can remain in stasis for a year.
I think guideline is good for elective changes...there are others we can't really do anything but go along with...
I found a partner and moved house to a new city all in my first year.
In the case of the house, it wasn't my house and it was demolished, so it was move or be homeless lol...
in the case of my partner, I'm not sure I was entirely ready or fully formed as sober me, but we rode the storms out...and both worked out ok for me.
D