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Also interested. If I create new addresses using your command, is there a possibility that I would generate similar addresses in the future? Just wondering if I should keep track of the addresses generated myself. Thank you.
since Electrum is an HD wallet that means each time you create a new key pair (a new address) you will use your master key to create it. basically your wallet increases the index of the key and derives a new one. for example if you have already used 10 addresses and request a new one it will give you the 11th address and anytime you wanted to recover you simply generate all 11 addresses again.
although in your wallet when you restore with the master key it automatically checks all addresses from index 0 upwards with a limit for balance so you don't have to worry about these numbers.