While Vatican II did not proclaim any new dogmas or canons or anathemas, it DID promote certain ways of viewing existing teaching.
For example, certain views on scripture and scriptural interpretation, certain views on what our proper understanding is to be of other faiths, and how we are to relate to people of other faiths, and so on.
While the Council documents did not enshrine these views in canon or dogmatic pronouncement, they nonetheless promoted them with the force of the Ordinary Magisterium, and we owe religious submission of intellect and will to their teaching.
‘Living as if they never happened’ does not, to my mind, approach anywhere near the proper attitude of religious submission of intellect and will.
And saying, as one poster here has, that the newer form of the Mass is in and of itself less reverent and so on is treading dangerous ground.
The Council of Trent anathematized anyone who asserts that the rites and ceremonies employed by the Church are ‘incentives to impiety’. The new Mass fits well within the definition of a rite or ceremony employed by the Church. And saying that of itself, absent abuses of its rubrics, it lessens reverence comes dangerously close to saying it is indeed an incentive to impiety, and so flirts with anathematized views.