Isn't it time to throw out the Cash Register?

It amazes me how many professional foodservice managers, owners, franchises and corporations are still hooked on the old ECR or for that matter even standard calculator type cash registers.
These same individuals are embracing the web, setting up online sites for menu ordering, discussion groups, marketing and more using technology but ignore the most important aspect of their business by continuing to rely on out moded hardware and services.
Why? It can't be because they are afraid of technology. They use it everyday to send email, research recipes, develope spreadsheets, payroll and more. But when it comes to the customer service end of technology they are resistant to moving forward.
Maybe some of you here can shed some light on this for us. Why would you stick with a cash register rather than moving forward? Your thoughts are greatly appreciatecd.