Just reading what astro posted.
Normally speciation is over a set period 3, 5, 7, 10, 15, 20 years depending on what the asset is. A building or a car or a machine are all different.
I interpreted astro quote as saying the useful life of the asset changes from in my case 5 to 7 years so I depreciate the 100mil over 7 years with 20milmover each of first 2 years allowed as best known info but then I'm not allowed complete 20 mil take
Say I sell player having written him off over 5 years but his new deal has 2 to run. I make back huge amount.
It's be to my thinking like writing off a car over 5 years and then selling it for same as i bought it, thus government is in effect paying me to have it.