I always think about the way you discover the problem. I used to say the same about RNG: if you need fast PRNG and you pick CSPRNG, you’ll find out when you profile your application because it isn’t fast enough. In the reverse case, you’ll find out when someone successfully guesses your private key.

If you need performance and you pick data integrity, you find out when your latency gets too high. In the reverse case, you find out when a customer asks where all their data went.