It isn't quite so simple -- usually you pay for the flexibility and freedom of FOSS with a significantly less polished UX.
In an ideal world, everyone would pool their resources toward free software and all would benefit. In reality, it is like a multiplayer Prisoners' Dilemma: people who "defect" by using proprietary software are rewarded (in the short term) with a nicer UX, at the expense of those who "cooperate", and at their own long-term expense.
There are other problems: FOSS (especially Linux) suffers from severe fragmentation, and I also question to what extent people are willing to develop software that is not fun for free.
Anyway, I never "forgot" the excesses of, say, Y2K-era Microsoft. I have just been skeptical of the workability of FOSS. But I do think it is the ethical way to go.
