It's hard to enshittify FOSS as long as good enough people willing to contribute to de-shittify stuff exist, but that is not the main thing that "defines" any trend.

The layman that tends to use stuff that is marketed (which is unfortunately enough of the people) will be affected by for-profit orgs trying to set trends in their favour. That is what will turn out to "define" the terms. Consider how Apple managed to keep their cult following for so long and how there are still enough people who consider "Windows" as the common name for Operating System. Even though the more technically minded people understand the differences, it doesn't change the fact that people's perception will be defined by what's more in front of them, until they individually realise their ignorance and decide to investigate.