Google penalizes (and sometimes completely ignores!) websites that use outdated technology. Google judges your website based on the underlying technology that it is built on. Web technology changes extremely quickly. A website built 10 years or even 5 years ago was built using very different technologies than a website built today. Well, hopefully… Unfortunately, there are still a lot of web designers and web design companies that haven’t upgraded to modern technologies.
Google penalizes websites that are built on outdated technologies while preferring websites built on modern technologies. Simply having a high-quality, modern website gives you a leg up on your competition. Additionally, and this is really important… If your website is built with certain technologies, Google will completely ignore it! Many older websites are built in such a way that search engines can’t read them at all.