Currently, Packages cannot completely replace the functionality of the legacy LinkedSource scripts, as I have to manually open up each game, just to update script code.
It is a major inconvenience for me, as a developer, because I manage many games. Having to open up Studio for each game is pain-staking, as Studio takes ages to load up big games, and because Studio is just slow, in general.
It would greatly benefit my Roblox game development if Packages could update automatically. So far, this is really the only reason I have not really used Packages that much, and I would be grateful if that can be changed.