Didn’t Vatican II abolish the Latin Mass?

No. The Council did not abolish the Latin Mass. It did not even ask for a new Mass.

Sacrosanctum Concilium, the Council’s document on the liturgy promulgated in 1963, called for moderate reform of the existing rite. It explicitly stated that “the use of the Latin language is to be preserved in the Latin rites” (§36), that Gregorian chant has “pride of place” in liturgical music (§116), and that “there must be no innovations unless the good of the Church genuinely and certainly requires them” (§23). The Council asked for the rites to be revised “carefully in the light of sound tradition,” not replaced.

What followed in 1969 — the Novus Ordo of Pope Paul VI — went substantially beyond what the Council had authorized. The new Missal was largely the work of Annibale Bugnini and the post-conciliar Consilium, working in the years after the Council closed. Many of the bishops who had voted for Sacrosanctum Concilium were surprised by what arrived. Cardinals Ottaviani and Bacci publicly objected.

Vatican II did not abolish the Latin Mass. The Latin Mass was set aside by an administrative act six years later, on grounds the Council itself had not endorsed.

Go deeper → What Vatican 2 Actually Said