Not in the realm of the physical world, maybe, but one implication is that the voluntarily unconfirmed person forgoes the Graces bestowed by the Sacrament.
I find myself in this position, as I have not yet found a time travel machine to transport me back to 1959 or so and the Church (minus the mistakes of modernism) to which I would wish to be Confirmed.
Do you think that, because of sin, the usual minister of the Sacrament of Confirmation (your bishop or his representative) can no longer do so validly?
Do you think the "Gates of Hell" have in fact prevailed, and thus Christ's mission has failed?
Or do you no longer wish to receive the Holy Spirit because of faults and sinful mistakes of some in the household of the Faith?
What is the nature of your difficulty?