I own a Ledger Nano S too ( since a year or three ) and it's true that there's little storage space on it. You can install more than 5 coins on it though. It's just a matter of deleting one, then installing a new one and then deleting another and re-installing one you need to transact with ( at a later time ) and so on and so forth. It's kind of a hassle but possible. I plan to get myself a Nano Ledger X soonish to not have to deal with this.
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