There are huge issues involved with a company website. But a large corporation or similar client might do enough communication with the Internet to make upgrading desirable. If you deal with a company who wants you to advise them on software issues, it may be helpful for your computer to be able to run the software in question. If you have ever used real-time chat software, you have used your computer to communicate. If you have a web site which advertises your services, you have just communicated with potential and actual clients without using e-mail.
Many attorneys use e-mail to communicate with clients.
Many documents are sent electronically. Many records are kept and examined without ever being written down on paper. E-mail may not be the primary means of communication. Lastly, this is the future of many forms of business communication. This is what is here now.