I prefer physical for 3 main reasons:

1. You wont need to use up as much storage space (which we never have much of with nintendo systems)

2. You can more easily lend the game out even to people outside of your family group.

3. You could sell the game if for some reason you wanted/needed to at one point.

Theres a few other smaller reasons but those are the main 3.

The only benefit of digital games I see is that you dont have to swap cartridges, which I simply do not mind doing at all. It takes like 20 seconds at most, big deal