As a trader you may need multiple exchanges based on the reason explained in the OP, and it could be an advantage in situations such as that. That said, there are also some disadvantages, if you have multiple exchanges, it basically means you have submitted KYC in multiple platforms and that is not so good for privacy, it. It also multiplies your chances of being a victim to a data breach, which could lead to a series of phishing attacks and if possible physical attacks.

As a trader you may need multiple exchanges based on the reason explained in the OP, and it could be an advantage in situations such as that. That said, there are also some disadvantages, if you have multiple exchanges, it basically means you have submitted KYC in multiple platforms and that is not so good for privacy, it also multiplies your chances of being a victim to a data breach.