As taken from a Theologian in a recent Catholic Publication. It is also states that in France, there are more people attending the TLM either through the Indult or SSPX than that go to the Novus Ordo:
There are serious concerns about the validity of the New Mass, especially when said in the vernacular. Quite often the words of the Consecration are ad-libbed and thus the Mass becomes invalid.(even if the translations are valid) When there are serious doubts as to whether one has attended a valid Mass or not, it is best to err on the side of caution and avoid the Novus Ordo altogether.
Moral Theology And Canon Law provide for such situations :
-Canon 1248.2. states that those who through inconveniece or
moral impossibility cannot fulfil the Mass obligation can pray at home ; “personally or in a family or, as occasion offers, in groups of families.”
-Canon 1323. States that one incurs no penalty for violating a
precept when he acts from serious inconvience or even percieved
fear.
Moral impossibility, can in short, be defined as when you believe that it is wrong to act in a given situation. (i.e attend the Novus Ordo)
Now, if you find the Novus Ordo to be a near occasion of sin,
or sacrilege, or a danger to your spirituality-- you are in a situation where you cannot take action (i.e-- you cannot attend the Novus Ordo )