We retain the convenience of WordPress by using it headlessly for authoring, regenerating the static artifact each update
We use web components and FAAS APIs for realtime interactive widgets
The 11ty community
Fast on my machine
Why so dramatic about performance?
Performance is an equity issue
Data transfer costs people money
Devices with less capable CPUs take a lot longer to parse javascript even after it is downloaded so some users are staring at a white screen forever waiting for your single page app to work
> 9% of Californians are accessing the internet on 3G
Unlimited data plans throttle users at bandwidth caps
Conditions vary for everybody, I used to commute on BART and parts of that journey I really appreciated sites that made an effort to be fast
You can recreate a user session video by watching every cursor move and keypress in javascript. These things are costly, use them sparingly if they are helpful.
Careless install instructions
Does this large script really need to be added in a render blocking manner?
The developers
Yes, I am part of the problem too, always trying to find a way to fit in some cool 3D dataviz
Don't slow down
Know your audience
Keep measuring and raise your team's awareness of the results