they said in their Twitter:”We are processing paper-based permanent residence applications to the extent possible. We will contact you once there is an update regarding your application. Please note it is not possible to re-submit a paper based PR application online.”
They also said before, on twitter, that temporary resident applicants in Canada would need to wait for Service Canada resume Biometrics collection. And they changed it recently, making temporary resident applicants exempt from Biometrics. To my knowledge, as well, they are scanning paper applications to allow the officers to work on these applications (so the idea would be to give this "work", of scanning documents, to the applicant in order to speed up the things).
Another detail, this can be considered case by case, I'm not saying that we need to submit again the entire application package. Example: someone who already passed through Medicals and is just waiting for Background check, maybe would just need to upload the Background form (Not the entire PR application package).
So honestly, I think this is something very easy to them to implement and move forward many applications.