Having two hardware wallets would be too much because I'm not sure what to do with my Nano S now. I'm just using it as somewhat of a "Colder Wallet" if that makes any more sense Lol. I transfer coins that I know that I wouldn't use and just let it stay in it. Nano X is my go-to Hardware wallet, all the time.
It is idea that Ledger is promoting for some time, and I do not see anything wrong in that, except for the fact that for some people is too expensive to buy one hardware wallet, two is just to much. But in case one wallet is broken or stolen, it is good to have one spare because only proper way for recovery is to type seed directly in hardware wallet.
As a user of Nano S for some time, I would also get one Nano X in months that come. Ledger will probably have some discount for Black Friday or later for holidays. Investing in security is never expensive, and that money is well invested.