Speed tests often test last mile. That’s only part of real world performance. Some examples of other factors to real world stuff: 1. If you internet provider h

Speed tests often test last mile. That’s only part of real world performance. Some examples of other factors to real world stuff: 1. If you internet provider has limited bandwidth when it connects to other parts of the internet. I used to have a problem where my ISP has one connection out of its network. That bandwidth was limited and caused real world issues. 2. TCP can and often does involve multiple round trips. As web pages have grown in size it’s had an impact on performance at the network level Increased bandwidth in the last mile doesn’t solve for these types of issues