No, it won't. It's basically just a NodeJS application server. On the plus side, you get a dashboard with statistics like latency, memory usages etc. But from your description it seems that it will be a redundant solution.
Despite a few shortcomings, such as the lack of automatic scaling, it is definitely more stable than, nginx unit, which we had a lot of problems with, due to segfaults and very "tricky" nodejs support.
If I understand the idea correctly, differential is for backend only (microservices architectures). There is nothing about browser support in the docs.
In this type of components, the worst is always the display of parallel events, i.e. events that have the same. I don't see such an example unfortunately.
Nice idea, there is also @babel/plugin-proposal-pipeline-operator which would require much less changes in the code if pipeline operator is introduced in the future. But it requires working babel.