Many are aware of what textual differences exist between the liturgies before and after the changes of the 1950s, '60s, and '70s, but most of us, myself included, were born well after the Second Vatican Council and cannot say much about the parish-level practice. In the United States most all Masses, Sundays inclusive, were Low Masses. For three seasons the "four hymn sandwich" was the norm at the main Mass and the choir took the summer off. In cities one could certainly find a solemn if one looked. Most parishes would upgrade to a Missa Cantata or some variation for major feasts. The video below, although of an Italian parish Mass, gives a pretty accurate image of an American suburban/rural area Mass in say 1960. The Mass is something of a hybrid between a Missa Cantata and a four hymn sandwich: vernacular hymns substitute for the Introit, offertory, and communion chants and appear again at the recession; incense is used; the ordinary is sung to the Missa de Angelis; the Gradual is sung in a ferial tone and the Alleluia to the Paschal tone; and the altar boys follow Low Mass ceremonial.
The Rad Trad leaves forming opinions to his readers, but he will say that practice of the older rites is probably better now than it was fifty years ago.