I was running 100% since reaching SE until a mid-November trip to Hong Kong. I actually could have upgraded both ways on YYZ-HKG, but Mrs. Lynchpin_yyz didn't have hers clear (she's only an E) so we chose not split up and sat in the back instead.
My first non-clear was on LHR-YYZ last Thursday. There were at least 2 other SE's in the back with me (all in row 16) along with a whole pile of E's.
As a result I'm not sitting on a pile of credits, so we're thinking of taking a trip or two to get a jump-start on re-qualifying and take advantage of the eUpgrades in the process.