My wife is T1D, moved to a closed loop last year. It has been life changing for her - this is not an understatement. Her mental health has massively improved because she isn't having up to 3-4 hypos a day.
One thing not mentioned in the intro, hormones hugely affect T1D. She's started perimenopause and everything went out of the window.
Closed loop has made this much more manageable.