And since you won't be able to modify web pages, it will also mean the end of customization, either for looks (ie. DarkReader, Stylus), conveniance (ie. Tampermonkey) or accessibility.
I hope Louis Rossmann catches wind of this - the more people know about this, the better chance we have at stopping this unnecessary "WEI" spec.
If an company wants a trusted environment for their code to execute in, they should be asking themselves why they're not running that code in an app, or better yet - on their own servers