The negatives vs a conventional automatic transmission.
1 The engine normally runs at a higher rpm, more noise, vibration, harshness, sometimes droning.
2 Sometimes chattering, slippage, overheating, jerking, shuddering, sudden loss of acceleration.
3 Typically cannot be repaired, cost of $3,000 - $5,000 to replace.
4 Typically don't last as long, many failures before 100,000 miles.
5 Not durable with higher torque output engines.
6 It's a mechanical steel chain/belt running in a pair of steel variable dimension pulleys. What more needs to be said?
Can I add one more?
7. CVT is basically the same as what is used in a snowmobile and/or some lawn tractors. So might be OK for something like one of those little "Smartcars". :grin: