I couldn't agree more. I deal with a large number of older people on a daily basis as part of my volunteer work. Getting these folk to use the Internet in any way is painful. For example, I send out these PDF reports once a week. It's the same template every time but for accounting purposes, it has to be done. I wrote a Python script to generate those for me and I stick them up on a simple website on S3. The script them emails everyone to let them know the report is available and that they can download it. It includes a link to the report and to the website with all the other reports. These guys absolutely cannot open a browser and view the PDF in the browser. If it's not an attachment to the email, they don't know what to do.

TLDR --- Email is great. It's so simple that even non-techies get it.