Not OP, but it compiles orders of magnitude quicker than Swift. It also doesn’t tend to grind Xcode to a halt as the language server tries to work out what’s going on.
But, in fairness, it’s a much simpler language than Swift. Which can also be a virtue.
If you need to be nitpicky about squeezing every last bit of performance out, then Objective-C is still useful, especially given you can just drop down to C in the same source files. I've become a big "C is bad and C lovers should feel bad" guy in recent years, but I can't ignore the "simplicity" (for some experience level definiton of simplicity) and speed of the old tools.
But, in fairness, it’s a much simpler language than Swift. Which can also be a virtue.