We are sometimes told that the imposition of a new rite by S Paul VI is precisely what S Pius V did in 1570.
It is not.
What S Paul VI did is precisely the opposite of what S Pius V did..
People who tell you anything different either have not read Quo primum ... or cannot understand Latin ... or have a regrettably fugitive grasp upon Truth.
S Pius V dealt with the question of churches with a Use of more than 200 years (i.e., going back to before the invention of printing made life so easy for liturgical tinkerers and innovators) in the following way.
He said "nequaquam auferimus" -- in no way whatsoever do we take it (their old rite) off them.