[Etheryte]

A 1.3 difference out of an opening sideline is neither rare nor lost, and mostly simply comes down to the fact that the engine doesn't understand the opening. Even the mod pin in the link you posted clearly outlines that this is a misleading way to frame this. It would be better to read more into the discussion before helping misinformation spread.

[Tenoke]

I didn't describe it as lost like the poster did, I said 'losing by 1.3' which is accurate. At any rate, if you actually did read deeper you'd see that losing by 1.3 is plenty relevant, when claiming 100% engine play correlation, and that the mod is somewhat cherry-picking. Further, playing openings where you are -1.3 in 2000 blitz is fine, but in super GM games 1.3 points down is more often than not pretty bad.

[zone411]

"The engine doesn't understand the opening" might have applied 10 years ago but you'll have a very hard time finding a single opening in all of chess where it would be the case now.

[roflyear]

1.3 is evaluated as more than a pawn, which is significant.