ZPower vs. real power meter....does zwift use the trainer info for anything?

If you have a real power meter…does it even matter what kind of trainer you use? I would imagine that the trainer info is used to calculate zpower based off of the trainer’s known power curve. If you use a real power meter…does it even matter?

If you have a real power meter, you can use any trainer or rollers!

meaning?

Meaning Zwift doesn’t care what kind of trainer you have. Zwift only reads off the watts from the power meter to determine speed.