This is a feature request opinion, not a task or anything else. This may not comply with the privacy statement or anything else.
I hope Wikimedia wikis uses JavaScript or something to record more user browser fingerprints (like canvas fingerprints, font fingerprints, resolution, API support, etc.), and provide the irreversible HASH IDs to CheckUser to compare different IP addresses but the same browser or device, rather than simply IP and user agent strings to confirm the same, the latter is more likely to be collided or forged and lead to unreliability.
An exact socks conclusion has caused controversy on technology and judgment in zhwiki: discussions in Chinese, discussions in Chinese and English.