Only once in all my years of dabbling in Access did it ever seem it necessary to do this and that case was all about data entry. I used a csv field but it required code to build a csv string as well as to separate it when needed. It's more likely that you are not thinking in terms of proper db design because when data is in rows and not columns, the number of data points or records in this situation doesn't matter.
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.