N
NPC
Guest
Well, Pope John Paul II canonised more saints than all of his predecessors combined. There have been more martyrs for the faith in the past century than in all of the previous centuries combined. As long as people keep striving to be saints, we will never be short of relics!There are only so many certified true relics available, eventually it is conceivable we could run out. It is also possible nothing would be available at the time of dedication of a new church but could be added later. The only portable altars I’m familiar with were those in the military but another category might include mission churches that are unguarded except for a single Mass per week or less.
I think the example you give about altars used by military chaplains would be a good example of an instance where a relic would not be placed in the altar…chances are the construction of the altar wouldn’t really allow it.