I can't find her name, so it's impossible to confirm whether or not she used to be a former software engineer at Apple.
I don't believe this though. I guess I've experienced too many low and mid budget Android phones and they've really slowed down. I had a Motorola phone that loaded Uber app for example for 15 minutes before it opened and it lagged.
I've never even had such issues with the iPhone 5s. My iPad mini 2 is still quite snappy on iOS 12, unless I browse the web, which I can't do anymore anyways, because Cloudfare doesn't let me visit any site.
I don't really know… I am still happy with my MacBook Air M1 Base model and iPhone 14, iPhone 12 mini and iPad 9th generation. All of them are way faster than my parents A-series phones and their old laptops.