In#771 and#774, I changedPlatform.os from an abstract type to a polymorphic variant.

This allows us to use the more convenient

ifPlatform.os===#ios {...}

instead of

ifPlatform.os===Platform.ios {...}

which is fine.

It also allows us to do

switchPlatform.os {  |#ios=>...  |#android=>...  |_=>...}

which is problematic as it compiles to something like

var match = ReactNative.Platform.OS;if (match === "ios") {  ...} else if (match === "android") {  ...} else {  ...}

which will break Metro bundler's inlining (see a previous discussion in#239 for more details about this).

So I am not sure anymore if we should introduce a breaking change that invites people to use a problematic pattern. What do you think@MoOx?