Former South Floridian here. If it's just me, I'd rather fly. Metrorail to MIA, carry on bag through TSA, and get plastered at the Centurion lounge before boarding.As a South Floridian, I would rather take the Brightline to Orlando than fly or drive.
If it's my wife and I, still fly.
Add my kid to the equation, BRIGHTLINE.
In fact, I just booked a random weekend to Miami in September to test it out.