Previous conflicts between the involved parties were intense but also defined by constrain on both sides.
Israel did not mass bomb civilians, and Iranian agents did not commit sabotage against infrastructure on US soil.
I hope this pattern persists.
A hand full of determined Ukrainians managed to blow up North Stream, some people plunged part of Berlin into darkness for 2 weeks.
Power and data cables as well as pipelines are as vulnerable in the US, as they are here. Maybe even more so.
A regime that truly feared for its existence, might decide to escalate, since there is nothing to loose.
Nothing went dark for weeks as a German you should know that.
I think the latter, the US is explicitly attempting a regime change operation so Iran has no reason for restraint.
The US is aware of this, that's why they evacuated all their bases etc within range