Upgrading to Livewire 4 was mostly smooth, except for a cryptic TypeError caused by residual Volt components. Here is how I traced the "Cannot use ::class on int" error and updated my single-file components to the new native syntax.

A method praised by many, but used by few.
Over the years, I have gained a lot of personal experience that is consistent with the current state of research.

For any opinion, look for both extremes for and against it and then find the approximate middle ground.
This is most likely the most reasonable approach.