The difference is that if you screw up your browser rendering, you're not messing up your data integrity at rest and creating compound technical and potential business debt. If anything in the critical path from pricing to payments that talks to your data store makes a mistake, you can risk anything from not recording your transactions properly to charging the wrong amount or not enough at all.
It's very expensive to acquire customers. It gets even more expensive when you have dirty data from incomplete domain modeling.
It's very expensive to acquire customers. It gets even more expensive when you have dirty data from incomplete domain modeling.