Why did Apple remove the Shadow DOM from Safari?

Question

safari

Why did Apple remove the Shadow DOM from Safari?

Answer 1

He was not there, in fact.
I will clarify. Apparently, this was an old implementation, from the time when Google and the company sawed the webkit along with Apple. After the great split of the webkit, the implementation of the shadow house, which was essentially not final, was gradually cut out as it greatly affected performance.
The working implementation of the shadow house in the form in which it is implemented in chrome was not there and will not be there yet. Maybe someday.

Answer 2

Link: caniuse.com/#feat=shadowdom