The Trump Administration Is Killing Auto-Start/Stop
thedrive.com
thedrive.com
But some people don't like it, and they should have freedom of choice. They pay for the gas, if they want to burn it at a stoplight they should have freedom to do so.
If I was in charge I would say: Keep the existing regulations where it's legally required to be present and legally required to be on by default. Add a regulation that says for new models, it's legally required to have a means of deactivation that can be done by a consumer or mechanic without manufacturer permission or special tools. E.g. a "secret" key combination that you can use to access a hidden menu, but it's not really "secret" -- e.g. it's explained on page 107 in the owner's manual. Just not easy to discover or do by accident.
If so, I'm not sure how much the environment is saved in the end.
However, always good to question what you know. After some digging I found this very informative video[2] with Lake Speed Jr as a guest, which showed a vehicle benefiting from the stop-start technology. The key finding was that it reduced the amount of fuel contamination in the oil. Lake Speed Jr said he had found fuel contamination to be the most reliable indicator for oil lifetime.
Perhaps a confounder is that stop-start does seem to require more from the oil[3], so if the user has gone with a cheap oil that doesn't have the necessary additive package, then that might indeed hurt the engine using stop-start.
[1]: https://amsoil.lube-direct.com/2019/10/engine-start-stop-tec...
[2]: https://www.youtube.com/watch?v=WMWWtA4YCio
[3]: https://doi.org/10.1016/j.engfailanal.2019.104344 (can be found on the hub of science)