If people and companies are forgiven the instant they stop being abusive, then what's the disincentive to being abusive again? Microsoft did what they did because they had a monopoly position; they've changed now that they've lost it. There's absolutely nothing to say that they won't go right back to the way they were if they get a monopoly again.

If someone has been hitting you with a stick for years, and then all the sudden shows up with a big smile because they've lost their stick and they think you could help them get it back, what kind of fool would help them?