Ok, this has been discussed before on this forum but only briefly, and not much since google’s Willow came out.
Now, according to this study, Zcash is much more susceptible to quantum computing than many other blockchains. However, Zcash likely has the ability to respond and reach consensus on a change to prevent this, if done early enough. For Bitcoin, it will difficult to implement change, and there is nothing they can do to stop Satoshi’s wallet from being hacked, even if they make the network more quantum proof.
Are there any current ongoing plans to get ahead of this issue?
On the contrary, only Zcash is the least vulnerable to quantum attacks.
The most ridiculous is the following paragraph:
ZCash is highly vulnerable to quantum attack against both its consensus algorithm and its signature scheme. However, the most damaging attack found against ZCash is vulnerability of its zero-knowledge proof protocol ZK-SNARKS, as this obfuscation method requires a trusted set up and therefore the production of a public parameter, which is a public key. If a quantum attacker gains the private key to this public parameter, they will be able to generate tokens at will.
Zcash does not have a trusted setup in Halo 2, this is already an extremely backward and outdated article.