What type of risk does poor software characteristic present?

Only product risks.

When you have poor software, you can already expect that you are going to encounter some problems with the technical aspect of your website. Your customers may be looking at your products when your poor software would act up. The products may disappear or may not become too clear anymore.

The harder your website is to use, the more that customers would rather check out other websites that offer the same or similar products instead. Your projects will not become affected because this is related to proper management of your plans and is not directly correlated to the software that you will use.

A poor software characteristic can be a product risk. This means that there is a big chance that the software itself might fail to make customers 100% satisfied with what they will get. When the expectations are not met, people will not bother to learn more about the products that they can see. This means that the quality of the product is not affected because the software is different from the product itself.

It is just likely that just because the software is poor that people will not be encouraged to purchase the product at face value. The quality of the product remains the same in the eyes of customers until such time when they will get the opportunity to use the product.