No serious company is using Storyboards. Only toy apps or small companies do, or junior devs. SwiftUI might be ok for them as well.
We are also working on SwiftUI stuff as well.
Let me know when any of the major companies actually use it seriously.
Out of curiosity, what products of note have you developed that give you the right to talk down to everyone else?
We are a bank. We make software used by millions of people a day.
We are a major company.
Lost your key, gatekeeper? :P
Plenty of serious development uses SwiftUI and storyboards.