You've hit exactly the downfall. I've always liked the idea of this sort of thing, but the benefits of using something like this almost never outweigh the cost

You've hit exactly the downfall. I've always liked the idea of this sort of thing, but the benefits of using something like this almost never outweigh the costs as compared to just eyeballing the pantry and winging the meal planning on short timescales. The system starts to become the point of the effort rather than just a tool to better achieve household goals. Unless you're dealing with a substantial household or some sort of communal living environment (lots of roommates, half-way house, dorm) or doing a lot of entertaining, the benefits vs. the effort just leave these things as interesting experiments. And I do see value in experimenting this way. I am an implementation consultant for actual ERP systems and data entry compliance is a real problem in the corporate world, too. There tends to be benefits to the data entry problem there, but the benefits tend to accrue a few degrees of separation from where the entry work takes place... so those that do the work often don't understand the need or importance. So if you solve some of the data capture problem in a small, low risk household environment, you may be able to apply the lessons learned to larger business systems. For example the more you could capture the data "in flight", like cameras capturing the information as you're putting recently bought groceries away or pulling them out to cook, do that well enough and now the benefits start to be larger in the home... but maybe you can see avenues to reduce the data entry burden in the warehouse, or the data entry processing desks, etc. But on it's own, using the same old data acquisition patterns as boring old corporate ERP, you're better bet is probably just pen and paper.