If I am the judge, as a general rule of thumb I would mark PCS -5, -8 just based on repeated programs. Otherwise, skaters gain unfair advantages in TES: GOEs, and favourable established benchmarking already, only fair.
OK, suppose you're a judge, not an especially busy one (maybe you have a family and you do work for a living). And you want to apply your judging standards fairly.
Let's say this season you're assigned to judge one discipline Olympics and also one Grand Prix or senior B event and one JGP (pairs and men at one of the latter, ladies only at the other), as well as your country's Nationals and several lower level events close to home.
Over the course of the season you end up judging a hundred or so different skaters, more than two hundred different programs between short and long, with similar numbers over the last few years.
You might also be asked to monitor top skaters from your country at the beginning of the season so you might have seen their programs before they competed internationally.
You love following the top elite skaters so you watch other disciplines in person when you're at competition venues, you watch TV broadcasts when you're at home, and you seek out online videos of the top skaters at season debut or important events or any time a skating friend says "Hey, did you see _______? That performance was amazing, you've got to check it out!"
So that might make 300+ programs you see each year. A more active judge, or one makes a point of watching every skater at all the JGPs, GPs, Europeans and Four Continents available online whenever possible, might see a few thousand different programs each year.
But you rarely watch the same performance more than once on video, so by the time the Olympics rolls around you've seen the top contenders' programs maybe five times previously, more if they had already used that performance for a full season (or two) previously.
When it comes to warhorse music, you've heard the same pieces many many times over the years, many times over the same season, and probably a couple of times in different disciplines including short vs. long programs over the course of this particular competition.
If the reigning world/Olympic champion comes out and skates to music s/he has used in a previous season, you'll probably remember that you've seen it often before and maybe remember particular highlight performances from last year or earlier this year, especially if you judged/witnessed them in person. You might remember specific highlights of previous performances and notice if they're performed better or worse than before, or notice if the choreography has changed so that memorable moves from past performances are gone or new ones catch your attention.
How do you penalize the skater in PCS based on what they do today vs. how today's performance compares with your memory of past performances (several of which might run together in your mind) vs. the general sense that you've seen this skater use this music before?
What about a non-medal contender? Maybe skater X from a small country competed unmemorably at the JGP you judged last year, kept his/her music, and used it again at the senior B you judged this year and again at the big event you're judging now. So this is the third time you're seeing this program from this skater over 2 seasons, but you honestly can't remember anything about this skater other than that the name is memorable and maybe an unusual axel technique or spin position or whatever. Do mark this skater -5, -8, based on repeated programs even though you really can't remember whether this is a repeat or not?
What about a breakthrough skater from another country you've never seen before? Skater Y has mostly been competing at domestic events in his/her home country. Maybe they have sometimes done well enough at their nationals to get sent to international events, but never one you judged at and sometimes they ended up withdrawing due to injury anyway. But this year they're finally healthy and on top of their game, winning their own nationals with a program they'd been skating for two years already. And now they're at the Olympics, maybe in medal contention, skating a program you have never ever seen before.
Do you mark PCS -5, -8 based on repeated programs?