Is it worth it?
The Microsoft team tested websites in normal operation. Any repetitive code slowed down, but there were also positive effects. They were able to determine an average improvement of 15% lower power consumption, which leads to longer battery life in notebooks.
For fun, the team named this experiment Super Duper Secure Mode in Microsoft Edge. It can be activated in the Canary, Dev or Beta versions. The option is on the internal side about:flags at Super Duper Secure Mode set.
Less complexity, improved security
This fun project from Microsoft could initiate a first rethink. Instead of adding more and more code to improve performance and then fixing many critical bugs, one tries to remove functions that are responsible for many security problems.