Iran fires missiles at Americans in Israel every day through Hezbollah. Need I remind you that 5% of Israelis hold American citizenship? Through Hezbollah, Hamas, the Houthis, Iraqi Shiite groups and other terror networks, Iran will continue waging war against Americans in one form or another the day after any deal is signed.
I wouldn't discount the significance of both sides framing this as the "end of the war."
Yes, the US and Iran will remain hostile toward one another. There won't be true peace.
But it will be very difficult for either to willfully return to active, intense hostilities for some time after the MOU is signed.
This is especially true of Trump, imo.