We appreciate your concerns based on reading the link, but ultimately the statements in the blog post are the opinions of just one person. Others have had different experiences with our themes. It's known that search can become a little sluggish when there is a huge amount of data but otherwise, our themes should be able to handle it. Hosting of course can influence overall performance as well, and articles such as
this are useful for explaining more about how to manage high traffic sites.
There are benefits to using a WordPress based solution. Ease of set up and management. Availability of third party plugins.
WP does
SEO better and there are some very good
SEO plugins. We are of course happy for a customer of ours to have achieved success with their website whilst using ClassiPress :)