It seems my concerns about cheap dice for generating entropy for a BIP39 seed were overblown. According to Kimi K2.6 cheap dice lose effectively negligible entropy compared to precision dice - likely around 0.1 bits. If you need to buy dice however, you may as well get the better ones IMO.

If you are going to roll dice, use precision casino dice, not the cheaper ones with indented dots as they not truly random. #Bitcoin #coldcard