This is exactly what I’m afraid of!

Arg, having trouble finding the thing I stumbled onto this morning. But I’ll pay attention and try to let you know next time.

Someone already sent it to me 😂

Ha, yeah second person to suggest this! But I can’t break my record!!

I have been there too 😫

Yeah, there certainly *are* valid reasons, I just don’t think that’s what’s going on here…

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It’s too complex to explain easily. Multiple people responded quickly, one came first, but the other didn’t get my message item was gone until it’s too late. Was not happy.

It’s too complex to explain easily. Multiple people responded quickly, one came first, but the other didn’t get my message item was gone until it’s too late. Was not happy.

Right. So models are just plain data (typically). But the purpose of an actor (like the MainActor) is to protect *state*.

I think every model probably needs to be nonisolated. Same thing for SwiftData and Core Data.

It's kinda the reverse. It would be very constraining for a storage system to support models that can only be used from the main thread.

There are valid reasons why the compiler team decided to auto-apply MainActor to Sendable types. However, I think it is quite a weird thing to do for the vast majority of types. Sendable combined with any isolation at all is just strange. You should be fine doing this.

For what it’s worth, they closed this bug by referencing a very specific language limitation related to protocol conformances. But based on my very cursory investigation, I don’t know if that’s actually what’s going on here. Could be, but not very clear.

Well, pretty much everyone did that too.

Just don’t be shy. I’m happy to answer more questions!

However! It is generally not true you have to understand it all. In fact that can be a trap.

Starting small and building up is, in my opinion, essential.

You are not to blame at all!

The difference between 5.10 and 6.0 isn’t enormous. Between 6.0 and 6.2 is relatively small.

The difference between strict checking minimal and complete is dramatic.

Haha well that’s something!

I’m assuming you are feeling overwhelmed and/or disappointed by the complexity you are finding?

(As opposed to a lack of information on that these things are?)