I have a legacy (early 2000s) Windows IIS hosting package on a company that originally was for a static html site. I have since created a WordPress site on a subdomain of the old one. The problem is because it is a very old hosting package, the wordpress site loads very slowly due to a long TTFB.
I contacted the company to upgrade the package to increase the performance, and they recommended moving from Windows ISS to Linux and Apache because 'Windows hosting and WordPress hate each other' and basically it isn't as optimised for it.
I was just wondering if this was actually true as I did some research and it seems like both Windows and Apache are viable for WordPress sites. It would be great if I don't need to switch so any advice would be greatly appreciated.