I think this is heavily dependent on if one of those addresses have actually been linked with any KYC platform because if none of the addresses hasn’t been linked with any of the platforms then it’s only your privacy that will actually be affected as all the addresses containing those UTXO will be associated to one entity because of the consolidation but you yourself you will remain anonymous since your personal details are hidden.
Not necessarily. Even if those addresses that are confirmed to be yours aren't linked with any platform that requires KYC, it could still be highly possible that your identity is known.
This forum, for example, is non-KYC, but some accounts here could be traced to actual persons. The same is true with social media platforms. Facebook, for example, doesn't require mandatory KYC to each and every user, but once an address is linked to a Facebook account, it becomes so much easier to find out who owns it.
We are still saying the same thing here, your address must be connected to something, you perfectly mentioned social media and it’s actually a platform too where you leave your footprints that can get linked to you. Like addresses on social media, profile picture and many more on your bio which exposes you, this is not actually different from a KYC platform because the exception is a government ID that the exchanges requires as more than the social media.
Even on this forum you can remain anonymous until you reveal certain details that exposes you identity and it’s what I was actually pointing at, if you have an address already associated with your social media accounts and you consolidate UTXO that includes this addresses then it signals that it’s yours