Content is king in a website, and if you doubt me, just Google something in Wikipedia. Wikipedia is nothing but content. What a wealth of knowledge is gathered in one place, maintained by people all over the world. Without content, it would be a waste of time.
Making sure your website is mobile friendly is really important. Old Joomla websites were not geared toward mobile friendly so it is imperative you upgrade your website. Here is a link to test your site to see what Google determines about a website:
Does it say the links are too close together? Does content fit on the screen? This test site will help you figure out what is not working. And that means Google will not give your site the ranking you deserve because it is not mobile friendly. Your site must be Googlebot friendly so it can be searched correctly. So this is the very least you can do for SEO for your website. The majority of visitors to your site will be using a smart device. Google's help informations says, "Mobile pages that provide a poor searcher experience can be demoted in rankings or displayed with a warning in mobile search results."
So what does that all mean to you? Convert your site if you are tech savvy enough, or you can hire PatVB Web Design to convert your Joomla website. Technology has changed a lot in the last ten years with the internet, and a good website recognizes this and serves its information so it best for the reader's experience.