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.
It’s the most widely used dialect of smalltalk and it compiles down to native code.
Also it’s a superset of C and C++ so you can mix all three in a single file, for better or worse.