There are lots of reasons why you might want to expand your website by using a subdomain with a different framework. I’ll use our new website as an example.
Our goal was to have a website to display our web development business separate to our plugin shop but with the same branding and style and while still using the nanet.uk name.
To manage this, we keep our website on the same platform it was before on nanet.uk and then on a subdomain, shop.nanet.uk, we use a different platform, allowing us to sell our plugins.
We were able to make the NaNet shop look like another page on the NaNet website, but really it’s managed completely separately. This allows us to manage our shop differently from our web development site. It also gives us a completely different back end for each function of the website, making the website much easier to manage.