yes but
They deanon'd the whole chain
And by doing so saved larger calamity
It is time to b humble
You and every else is blowing the severity of the bug out of proportion,
for your own malicious agenda. They only thing this does is reveal which public key in the ring signature is the actually sending coins.
The required use of stealth addresses still protects the recipient of each transaction. I believe the token system also offers some protection.
Complete de-anon? Blowing outta proportion?
Pass the pipe
It wasn't completely de-anonned. Only a very limited amount of stealth transactions got unstealthed.
No stealths got 'unstealthed'. All rings got 'unringed'. That makes the chain fully traceable but multiple payments to the same address are still not linkable, unless they are spent together, which is common. So this is quite fragile on its own as a privacy method, arguably useless.
Stealth addresses are 100% equivalent to not reusing Bitcoin addresses.
Unless you think it is possible to provide real privacy on Bitcoin without adding any form of mixing (rings, coinjoin, whatever) just by not reusing addresses, then killing rings makes it a full deanon.