I was in high school so can only give my own recollection of how things were done in our parish (Archdiocese of Detroit). The desctruction of the sanctuary was accomplished literally from one Sunday to the next in our new church, barely 10 years old, built with 20 years donations of working class people, after they had built a school first, the loving design of our late pastor. Imported marble altar rail literally trashed on a junk heap (we saw it being hauled away) a third of the hand carved pews similary hauled away, magnificent organ could not be moved from the abandoned choir loft but electronics were installed in the new spacious choir area to the left of the altar (which necessitated obscuringg St. Joseph’s side altar). Our organist-choir director quit within the year and was hired by a large affluent Methodist congregation so he could continue to support his family.
The changes in the mass were enacted through poorly printed “handouts” same with the (dreadful) songs. it was a couple of years before missalettes and hymnals were availble. There were pulpit and bulletin announcements to the effect that hey folks this is the way it is going to be, but except for perhaps one paragraph on the vertical vs horizontal dimension, and the priest praying with the people, not much on the “why” are we doing this. We got a bit more in our HS classes, but accompanied by such a wash of other new information (for instance hearing a priest say at a retreat our most commonly confessed sins are no longer sins–the ones still popular on the CAF morality forum), that it might have got lost in translation.
We were involved in school activities that involved frequent visits to other Catholic schools in the Diocese and Mass in those parishes or at diocesan wide events, and got a bit more acclimation and education, but not enough. the most notable visible change which did seem to happen almost overnight, in addition to moving choir areas, was the concommitent disappearance of the tabernacle and it relegation to a side altar or another location altogether and with that the lapse in genuflexion, exposition and adoration, holy hours, benediction, 40 hours and other Eucharistic devotions.
What I remember most are 2 things. One that changes happened in dribs and drabs over a few years and the perpetual frustration of almost every Advent some new tweaks being introduced, but never everywhere at once, so you got jumpy everytime you attended another parish, never knowing what to expect. I remember longing for one global change, then let’s just settle down.
The second is the feeling expressed almost universally among my generation, in HS and college campus ministries, and reinforced by the way all of this was presented by our teachers and such, that, since the Eucharist was no longer so honored and so central a presence in our churches that there was no longer any visible honor paid to the reserved sacrament, and therefore almost overnight it seemed, a conviction that it was therefore only a symbol, not a reality, of Christ’s presence. This, accompanied by the repetition of the theme that Christ is present most fully in the people, the assembly, and the diminution of the priest’s central role, is I am convince responsible for decline in belief in the Real Presence of the Eucharist which is so much a feature of Catholic writing, teaching and catechetics produced by many of my generation.