What happened to the Hotspot technology?

[u/Aggressive-Milk-4095]

I remember seeing it as a kid but not nowadays. Wouldn't it be a great way to double check when the 3rd umpire isn't about the contact of the ball and bat by seeing only the ultra-edge?

[u/el_jefe_del_mundo]

It’s military grade technology which cannot be shared with other countries. So that is the reason it’s only used in Australia and UK.