1st. I agree that the thread is significantly incorrect and outdated, and has definitely not aged well. It was half-baked given the nature of the issue at the time.
2nd. Bakura's feat does not work how you suggest it does. The entire point of the thread was that while the monsters and by technicality, spells and traps are real, their effects aren't (This needs to be more clear). Bakura's feat was direct proof of that, as instead of being a combination of life energy absorption and summoning negation [And yes, this is the anime effect, not TCG] that affects both sides, it was merely binding them.
3rd. Kaiba (Haven't seen it so I'll respond later)
4th. Obelisk was affected within the card game, so I'm not sure why this is proof of anything?
5th. Blue-Eyes Shining Dragon, interestingly enough with context, debunks your whole point.
"In the form of the God his name implies, Anubis stared down at everyone with the face of a jackal. The faces of everyone, who were standing still in amazement, were reflected in his beast-specific black eyes.
"And Game of Darkness was supposed to be over already!" Yugi exclaimed.
"That's impossible! This is the real world!" Kaiba too exclaimed. "
Yugi literally points out that the Game was supposed to be over, it's still active, hence why Anubis and by extension, BESD was real.
Now if you were arguing the effects become real in a Shadow Game, I would honestly agree, but it isn't specified here, so I'm not sure if that's your argument.
...And that's not all, as that brings a new issue.
"Blue-Eyes Shining Dragon: Sacrifice Ultimate to summon the mightiest dragon!
"Shining Burst"
Increase its attack power by 300 for each Dragon-type in your Cemetery.
"Shining Flare"
The player can choose whether to have the effects of a Magic, Trap, or Monster that target this card affect it or not. "Shining Nova"
By offering this card as a sacrifice, you can destroy any card on the field. " -Official Description within the Novel.
Literally, the one-time BESD was affecting Anubis, it happened by changing/ignoring over HALF of the effects. It's requirement to summon, its restriction to one card destroyed, the fact that the card burns up after use, etc. So even in the best case scenario, it would mean that not all of the effects translate to the actual world.
6. Arc-V is perhaps, the biggest counterpoint to your argument.
"One single world… In that world, Real Solid Vision was already implemented. However, it was still in the early stage of its development. Its use was limited to interior decoration for residential homes and advertising."
Leo literally states that solid vision, the thing making the monsters real, wasn't even used for monsters before he made it so. Everything takes place before Arc-V's dimensional split, much more so before Leo's birth. That is a statement suggesting the effects weren't even real before Arc-V, much less so before every other series.
