Fair, and it's the part I'm least settled on. The account exists because the full plan is a server side run that gets stored, not to build a mailing list.

Being straight about it: the long-run panel is the Dimson-Marsh-Staunton dataset, which is a paid commercial licence, plus the compute. So this won't be free forever. The Quick Check will stay free and anonymous.

The detailed side is where the real inputs are: mortality table life expectancy, CPP/OAS or Social Security start ages, pensions, tax, flexible spending. Four inputs can't tell you much, agreed.