Wouldn’t you want to have manual control of it? Unless it’s a hybrid, from what I was told, it wouldn’t make sense to turn off the engine unless you’re be staying for 30 seconds or more, which the car couldn’t possibly predict.

What is even auto slop start? Sounds like something I’d never want in my car ever.

It’s not a given. Some registars can be total dicks about transfers and drag it until expiry, after which they would kindly offer their services of “negotiating a buyout from the owner” (i.e. themselves), asking $100 upfront just for them say some absurdly high price and then hold it on park for a whole year just out of spite if you ever initiated the process.