Which (breaking) changes would you be willing to accept in a major language release? [+ Feature wishes]

[davdroman (David Roman)]

var allIWantForSwiftmas: Is? = nil

Pre-pitch: remove the implicit initialization of Optional variables

I just wrote a thread on this and then realized we could still fix it in a language version. In Swift 6, optional variables become uninitialized by default, like all other variables. Locals and globals get a fix-it to add = nil. Properties only get that fix-it in a note attached to the error about leaving the variable uninitialized, since it’s not obviously the right thing to do, only the Swift 5 thing to do. A migrator could auto-apply that fix too though. Thoughts? See also: What is a 'va…