Simcade is the dumbest term ever coined by the sim racing community groupthink. I prefer "sim-lite" because what is known as a "simcade" is still simulating, and equating it in some way with arcade by tagging the "cade" on the end is just a less aggressive way of an elitist attack on a title that may not be of their liking. Only true "arcade" racers are not trying to simulate anything in reality.
My examples would be:
Arcade: Ridge Racer, Burnout Paradise, Outrun
Sim-lite: GT7, WRC 10, DiRT Rally 2.0, Forza
Full sim: Assetto Corsa Competizione, rFactor 2, Automobilista 2
I look at it more as being what kind of simulation value a title brings to the table. High simulation value means everything is being modeled (as correctly as possible): air pressure, elevation, tire temps, tire pressures, aero, green/rubbered track, etc... ACC for example has all that and I consider it a full sim. GT7 does not have all of the elements required to be a full sim, but that doesn't mean GT7 ceases to be a sim. It's still a simulation of driving automobiles, albeit with less overall simulation value.
The #1 criteria for me is if the physics are intuitive, no matter how basic the rest of the game is. This is a problem I had with Project CARS 2 which has very high simulation value but handling that did not feel intuitive to me. ACC on the other hand is a game with very high simulation value but does feel intuitive. That's why I put 200 hours into ACC and around 10 hours into PC2. GT7 feels intuitive to me. So I enjoy it even though it is lacking in simulation value.
And if you think things are bad around here, try Race Department or worse, a lot of the streamers from Spain who slap "arcade" on anything that isn't iRacing or DiRT Rally (which is an oxymoron in itself).