

Has it though?
Yes it has… because I’ve attempted to take loans primarily under my wife who doesn’t hold as high a score as I do for a myriad of reasons. Same shared incomes… same shared assets. Only difference is my score is higher as far as they’re concerned.
One card at $5k limit (making this number up, only you know what you’re approved for on your card) doesn’t necessarily show worthiness for holding more debt. I have 4 active cards… aggregating about $40k of revolving limits. Of course rarely ever use them and pay them down.
Holding no non-revolving debts can actually hurt you. If you haven’t had a car note or mortgage in a long time, they don’t know if you’re capable of holding such debt effectively anymore. Before we bought a house, I specifically held onto the car notes and only paid the second car off after we secured the mortgage. Of course with a mortgage, I’ll be sitting on “debt” (really building equity in the house) for a while. but meeting the terms of that debt monthly only strengthens evidence that I can manage debt correctly, increasing score.
Edit: For you, try to increase your limits on your card. If not take out another card and make a purchase every few months on it to keep it active. As you increase the “allowances” you have, and keep that in check… you’ll find your number goes up quite quickly. As far as non-revolving debt, don’t take out a loan if you don’t need it, but think about sitting on a loan for your next purchase even if you have the cash on hand to build the credit up.