My opinion too. There are hard problems to solve with iOS and changing language wasn't needed. I really enjoy Objective-C and with Xcode it's a joy to program! It's also closer syntactically to Javascript and C which are also part of the modern ecosystem (embedded ESP32 and cloud node.js computing). - I tried Swift and it was very frustrating - and that's after 45 years of programming every language out there.

I'll stick with Objective-C, originally from Brad Cox in 1983 (I have his book).

ps. I use "null" as a valid value.