This is exactly why the distinction matters (and normally I don’t like the terminology arguments). Soulmate love CAN fade, those contracts have expiration dates baked into them, and once the karmic lesson completes, the emotional charge genuinely dissolves. Like, into nothing.
People really need to stop lumping these two together. If someone is questioning whether they ‘fell out of love’ they should honestly examine whether this was a soulmate dynamic being mislabeled. The twin flame energetic signature doesn’t have an off switch. Different blueprint entirely. The TF connection isn’t operating on the same rules, so measuring it by whether the feelings ‘faded’ tells you more about what the connection was than where it’s going.