SkyECC was blown wide open by LE.
"About a billion messages were intercepted, about half of which had been decrypted by April 2021—further avenues of inquiry were expected to open as decryption progressed"
They also suddenly claim all the users that got intercepted were using "elaborate fake" SkyECC apps and services, yet oddly those same "fake" apps could talk with actual SkyECC users, so, y'know. Grains of salt.