Why you think RQ is likely nowadays? Your assumption is based on any patterns or any particular CIC policy? It's true that we dont see many applicants here reporting getting RQ.
Can you elaborate a bit?
I cannot speak for what was intended by another forum participant, but the context was a query as to what additional requests could an applicant receive after AOR, and the answer does indeed range from a Finger Print request to the full-blown RQ. That answer does not suggest that RQ is likely. It is among the possibilities if something in the application triggers a non-routine process.
The vast majority of applicants are routinely processed. Not even a FP request. They send the application. There is AOR. The applicant gets notice of this and a copy of the Discover Canada book. The application goes in process. The applicant is scheduled for an interview, and depending on age, also for the knowledge of Canada test. Then the applicant is scheduled for and takes the oath. Done.
But sure, some applicants will receive a request of one sort or another along the way. And as others noted, the possibilities range from a Finger Print request to the full-blown RQ (CIT 0171).
There are other possibilities in-between, ranging from requests for specific documents (such as a police certificate from this or that country) to the RQ-lite requests in a CIT 0520 form.
We have seen recent reports of RQ. Even without those, however, there would be no reason to suspect IRCC would cease using RQ. There are bound to be cases in which IRCC perceives reason to question the physical presence declarations made by the applicant in the presence calculation, and depending on the nature and scope of those questions, the nature and scope of IRCC concerns in the particular case, either the RQ-lite (CIT 0520) or the full blown RQ (CIT 0171) will be sent to the applicant.
There are many explanations for the decline in the number of RQ'd applicants. Just the transition to a physical presence requirement alone eliminated the main reason for RQ in the past, the short-fall application (PRs eligible because they met the basic residency requirement, but whose qualification per the three years resident-in-Canada requirement was questionable given their physical presence was less than 1095 days, noting that during the Harper government CIC began approaching almost all such basic-residency (short-fall) applications as questionable if not presumably unqualified).
But obviously there will continue to be some applications filed for which IRCC will have some doubts about the claimed number of days the PR was present in Canada. Those applicants will be RQ'd.