I would 100% keep this assets on us for the future and specifically only for new players. It doesn't matter that the pack is out of Modern. Think of them like a Weatherlight MTG pack. Esentially low value, not useful for Modern or Standard, and still today it costs... * checks the interwebz* $35 USD when its retail value was $2.99 ...
As a side comment I would love to see a Proposal, *any * proposal, that doesn't involve to spend, sell, burn or gift DAO Assets on diverse adventures/projects. Would be nice. One. Or two, even.
yes I'm completely with you @renovatio ... Its refreshing to see that someone else shares my feeling about our assets :)