For how long should it rest in the sanctuary and burn? I always felt that there was a certain mechanistic naivete in the reasons given for extinguishing it after the Gospel of Ascension day. I wonder if readers can supply information about the varieties of usage which have existed in the Western Church: I believe, for example, that in Durham Cathedral it burned for 50 days: from Maundy Thursday until the Octave of the Ascension. And if we ever restore the baptismal understanding of Pentecost which the older liturgical books encourage, it will certainly be neater to retain the Candle's use until at least Pentecost Sunday (since it is lit and made use of in the Blessing of the Font in the Pentecost Vigil).
And I like the Novus Ordo idea of using the Candle at Baptisms and Funerals. I'm not a Pius V Fundamentalist!
Such questions could do with being resolved; since it is very untidy, in those churches that give a home to both forms of the Roman Rite, for the Candle to be alight at OF Masses ... but dematerialised away for EF Masses.