Most companies create websites on crowded platforms that have 3rd party technical support.
So when there is a technical issue involved in site manipulation, i.e. a plug-in updates, they have to wait for other development teams to make the site work appropriately, or in some cases, recreate your site from scratch.
Our sites are all done in house on a proprietary platform that allows us to custom fit each site to our customer's needs.
This equates to a 99% uptime, so your customers can always see you.