Follow good data practices and you would never need your data profiles to exceed genuine data limits.
This may or may not be the most recent increase in data limits for classic DataStore. Your data key can hold 4mb of data before it hits DataStore’s per-key ceiling. Whether new limits will be introduced alongside of DataStore 2.0 I’m unsure.
Following good practice in writing to a key can also help to avoid throttles (60+#players * 10 in all writing instances, whether UpdateAsync or SetAsync). I recommend giving a full read to the wiki’s documentation on DataStore if you’d actually like to understand why an “infinite” data key is illogical and unnecessary.
There are always other options when it comes to Data (HttpService, DataStore 2.0, MemoryStoreService). However; when it comes to data, no matter what you use, proper data etiquette and practice are required based on what service you have decided to write to.