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I used it in the past and really disliked how it encouraged things like defining which functions to call by specifying a string with the function name. I would have much rather had it be more opinionated and require passing a reference to the function so it forces you to write code that benefits from typescript

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There's many benefits in having a state machine configuration that can be serialized, especially if you can store that config in a database and load it at runtime. And actually xstate does allow you to pass the functions directly if you want to

Yes it allows strings or references to the function. My issue is that since the former is allowed, either people start using that method, or you have to start a “debate” within your team about patterns to avoid.

The serializability of your state itself has nothing to do with how events are bound to callback functions. If you serialize a string name of a function and not the source code of that function this buys you nothing. The source code itself is all text, so its serializable no matter whether the code is suitable for being statically analyzed

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