Okay, so i looked through
Sans past matchups and here are some of the ones that seem outdated. Note that a lot of these are being removed due to his outdated statistics from his early 2018 profile and before, back when sans was so powerful he could beat demigra (apparently with speed unequal too) and nearly beat reinhard heydrich.
Twilight sparkle: Outdated matchup. Already been removed from twilights profile. Many arguments are based on sans karmic retribution and other abilities etc
The batter: Horribly outdated. Batter probably stomps. Even without it, the arguments are based entirely apon sans outdated statistics.
Jotaro kujo: I think the thread itself basically explained why this is unfair. Jotaro is bound to open with time stop and one shot sans even harder than he could before.
Hulk: This is as outdated as the broly matchup. The only reasons given for sans being able to soulhax the hulk rely on him being able to soulhax a 2-B and karmic retribution (stuff he no longer has). Hulk resists sans and lands an area of effect attack before sans can even do anything as stated in the thread.
Psylocke: The reasons for this not being a stomp is that sans has 8-C attack compared to her 9-A durability... yeah. And that even though sans is guarunteed to get haxxed from the beginning, it isnt a stomp because sans has an attack which can stomp her
Im pretty sure this logic is no longer accepted. If psylocke is bound to hax sans before he can retort (pretty much the reason she won), then it is a clear as day stomp. Unless sans actually has a chance at winning with his opening attack.
Goku black: Really old matchup, exteremely outdated arguments. Likely outdated for the same reasons as the broly matchup. Goku black can probably just fly into the air and land an area of effect attack. Im pretty sure even normal goku has stomped sans in the past tbh.
Talio Im actually unsure if this is outdated but im posting this here just in case it is outdated. It depends on how good his resistance to soul manip is and if he is bound to start with time slow. If not then they may not be outdated. Though it is based on sans current abilities. What do you think?
Oh god im out of time.