I use different wallets for different purposes. I don't like multi-currency wallets because I don't like to keep all my eggs in one basket. I use Electrum for bitcoin and MetaMask for Ethereum and its tokens. I also sometimes use MEW. First of all, ease of use and security are important to me.
I think you use too many wallets and will have a very high risk when you forget to access your wallet, maybe you can use a trust wallet which in my opinion can replace all the wallets you are currently using.
Well, both of you have a point.
But I guess he prefers most if he has multiple wallets to store his coins to avoid the risk of losing it one at a time. I guess, he uses some kind of note to write the information about his wallet.