On the ammunition production front I think aside from the capacity to continue supporting Ukraine, and subsequently build the stockpile of ammo back up to restore direct Western warfighting capacity this could be seen as preparation for future proxy wars. If say some Asian country was invaded by Russia or some other threatening power and that turned into an extended conflict the West needs to be able to sustain support to them too, and we've seen how vital artillery systems are.
Hope they'll be firing up production lines for new MANPADS and portable anti tank missiles too, having seen how important they are as rapidly deployable tools to help infantry defend against armoured & aerial attacks.
Ukraine has probably given planners a lot of food for thought in terms of preparation for future war scenarios, seeing how important artillery still is, how drones & loitering munitions perform in large scale wars, effectiveness of AA missiles at denying air superiority, and just how much ammunition gets used up in extended combat.