Is there anything new in iOS 11 compared to iOS 7 that one could point to to show a major new feature that would justifiably be significantly slower than the iO

Is there anything new in iOS 11 compared to iOS 7 that one could point to to show a major new feature that would justifiably be significantly slower than the iOS 7 days? I can't think of anything that makes sense as a new FooBar feature that would make iOS 11 run significantly slower than any previous version of iOS dating back to iOS 7 (when the entire UI last changed).