With most in my generation, I am trying to do New Math with an Old Math mind. All that said, I'm pretty sure 2 x 10 still equals 20. And, Pi is still 3.14159265359 and is the ratio of the circumference of any circle to the diameter of that circle.
All this brings to mind age. Is 1 still 1 or is it 2. I turned 62 this year. Does that mean I am enjoying my 62nd year of my life? Oh, no! Insult to injury, in truth I am now in my 63rd year. Let's do the math. I was born in 1959. Last time I checked (in Old Math Terms) 2021-1959 equals 62.
So I have achieved 62 years of age, which honestly means I am now in my 63rd year. But, by God, I am not 63 yet, therefore I will take a victory lap and enjoy my 62 years. 63 can wait, unless I go back to the future.
But, as "they" say, 'Age is just a state of mind.' I find little solace in that given this most likely was said by some 30 something trying to assuage an elder attempting new math.