Firestore – If I give Document ID in Alphabetical Order will it create hotspots/inefficiency?

I want to build users collection which will have Documents with IDs as A,B,C,…Z.
Each Document will contain a subcollection which will contain data of all users with starting letter A,B,…Z depending on document ID.

In Firestore documentation it is mentioned

Do not use monotonically increasing document IDs such as:
Customer1, Customer2, Customer3, …
Product 1, Product 2, Product 3, …
Such sequential IDs can lead to hotspots that impact latency.

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So Does using alphabets as Document ID create the same issue and cause hotspots or some other in efficiencies?
Thanks

>Solution :

Yes, you could observe the same effect. It’s best to use fully randomized IDs like you get if you use add() to create a new document.