Consider these scenarios through 52 weeks of a year:
Case 1:
You have effect active weeks 1, 2, 7, 8, 13, 14, 19, 20, 25, 26, 31, 32, 37, 38, 43, 44, 49, 50
You have a second effect active weeks 2, 3, 8, 9, 14, 15, 20, 21, 26, 27, 32, 33, 38, 39, 44, 45, 50, 51
You have a third effect active weeks 3, 4, 9, 10, 15, 16, 21, 22, 27, 28, 33, 34, 39, 40, 45, 46, 51, 52
You have a fourth effect active weeks 4, 5, 10, 11, 16, 17, 22, 23, 28, 29, 34, 35, 40, 41, 46, 47, 52
Case 2:
You have effect active weeks 1, 2, 7, 8, 13, 14, 19, 20, 25, 26, 31, 32, 37, 38, 43, 44, 49, 50
You have a second effect active weeks 2, 3, 8, 9, 14, 15, 20, 21, 26, 27, 32, 33, 38, 39, 44, 45, 50, 51
You have a third effect active weeks 3, 4, 9, 10, 15, 16, 21, 22, 27, 28, 33, 34, 39, 40, 45, 46, 51, 52
You have a fourth effect active weeks 4, 5, 10, 11, 16, 17, 22, 23, 28, 29, 34, 35, 40, 41, 46, 47, 52
You have a fifth effect active weeks 6, 12, 18, 24, 30, 36, 42, 48
Case 3:
You have one effect active weeks 1-9.
You have a second effect active weeks 10-18.
You have a third effect active weeks 19-27.
You have a fourth effect active throughout all of those and most of the rest of the year.
Consistent with the above interpretations about no Warping for a hundred simultaneous spells continuous for a week, how many Warping Points would be accumulated over the year in each case?
So far the only deviation has been a claim that "always" means truly always despite the text stating otherwise. And then there have been claims such as "It clearly specifies that <50% does not contribute." which contradict the rules, considering the rules pretty clearly show a continuous sequence of 30 week-long effects will cause Warping, even though each one is less than 50% of a year.
The only conclusion I'm drawing is that one interpretation of the core rules is consistent with them and one is not. Therefore one never disagrees with canon. From the core book alone, either is fine.
Regardless of this, the original point was that this Virtue opens up a second line (longevity had already been acknowledged) to power that had not been mentioned. Whether everyone would use it or not is irrelevant. The newly opened route exists regardless of the choice between these two readings. The newly opened route does not require significant investments of time (and could be managed automatically with enchantments on a Talisman).