GR Yaris Engine stop and start problem.

BTW, will there ever be a real way to permanently disable this auto start-stop garbage, or is this car doomed to suffer from it forever?

And no, I don’t mean some half-baked dongle workaround. I mean a real fix.
No, it won't. Just buy an adapter from AliExpress for $20 and you're good to go. Once installed, it is automatically deactivated at every start.