how much weight do you save on the er one using these axles?
You too can save about 30 grams/1 oz by spending $200 for these axles...
That's about $6.66 USD per gram in weight savings. It would be far less expensive to stop drinking a beer now and again, and lose the weight off of your body.
OTOH, if your body mass index is already optimized and you have less than 5% body fat, then spending $200 to save an ounce is a great deal...
Just saying...
Edit: Looking at TI axles for sale on Aliexpress, one reasonable priced listing for TI through axles, the TI axles they are selling weigh more than stock Aluminum axles.
https://www.aliexpress.us/item/3256808530370099.html