Quick addition. The Toyota hybrids (which are now the Prius/Corolla hybrid (slow hybrids) and the Camry/Rav4/Highlander hybrid (fun hybrids) use an e-CVT.
Don’t let the CVT fool you, an e-CVT is a radically different design than a CVT, and by two different data sources*, the reliability is:
e-CVT>Manual>Torque converter>DCT/DSG>CVT
They almost never break, and are available almost for free on ebay, so if you break one, the repair/maintenance ordering is:
Manual>e-CVT>Torque converter>DSG/DCT>CVT
(if they *do *break, swapping one is more difficult than swapping the clutch which is what usually fails in a manual)
*my data sources are: Toyota is the most reliable manufacturer, and the Prius is their most reliable car, per both Mymechanic and Consumer reports. Also, the Prius “transaxle” is available on ebay for $300 from wrecked examples with ~60k miles on them. The reason it’s so cheap is that it fails much less often than people wreck Prii.
Here’s what an e-CVT looks like inside: https://www.youtube.com/watch?v=dLNDGUISTYM
Notice there is no chain, there are two electric motors, the gears do not change states and are ever locked in a fixed orientation. These are the reasons it’s so reliable.