sha2 based, and faster than md5? do you really not see the value in this? sure you wouldn't want to use this your own coin, because of say asic, and gpu miners, and your saltless password hash for bruteforcing issues.
but databases, filesystems, checksums for packages, git(to be fair, they're all some sort of storage systems)
by the definition you said above we would still be using md5 in everything.
Actually, even in coins fast hashes have their place (specifically, in Merkle trees; we're using SHA3 in Ethereum precisely because computers will have hardware modules for it), and for mining you don't want to be using anything that's classified as a hash function anyway.
but databases, filesystems, checksums for packages, git(to be fair, they're all some sort of storage systems)
by the definition you said above we would still be using md5 in everything.