Quote from: Majestic-milf on July 03, 2022, 09:17:20 PM

1. It is quite harmful to one's privacy and becomes an impediment to BTC censorship resistance
3. Quantum computers could extract private keys if these addresses are re used.

I think the Author is somehow misleading, if I want to re-use a wallet address multiple times for transactions, it doesn't give me any security harm to my private keys, also we have not seen any computers who have done that currently except for Quantum computers that have been making news but it is still hypothetical, nothing has been done so far. However, address reuse is a big concern when it comes to privacy, you cannot preserve privacy by using a single address for incoming and outgoing transactions every time, the chain surveillance are watching the network, and the moment you do that, you can easily be detected as the owner of the address and the big problem is that you wouldn't be able to combine it with other UTXOs as soon as that address becomes expose to chain analysts.
So, technically, don't use an address more than once.

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2. It can leave one open to niche attacks and one becomes vulnerable to these cyber thieves who will extract private keys from signatures after a transaction has been made.

A node can carry out a transaction Malleabity by changing your transaction ID on the network but they don't have the strength to extract the signature from a transaction, this point is kind of too off.