DYOR, I am not shilling. I don't care if you believe me or not. Infrastructure alone without even getting into the technicals (of which I am not an expert on the cryptography) is reason enough. The future is bright for Grin by all accounts but it is just that, the future and until that materializes (if it does) there is Monero for fungability and BTC for everything else. One issue I understand with grin is that it depends on nodes deleting transactions yet how can you enforce that and verify it?

Anyway here's a good link touching on it. If you find better info go ahead and link it for me as I am interested in both projects.

https://www.reddit.com/r/Monero/comments/a8wqug/regarding_beam_vs_monero_also_grin/