Magento 2 for Checkout only?

Hi there! Now this might seem absolutely insane… but is it possible to have Magento be used for its checkout / order process only? Not even a product catalogue.

For example, rather than having our entire product catalogue imported into Magento, when a customer wishes to add a product to their cart, we then create a new temporary product in the catalogue, add it to the users cart, let them proceed with the order, then eventually removing that temporary product from the catalogue.