Probably. But its a prisoner dilemma and part of the reason apps shut down was because they lacked the time to react. There's no way they'd have an alternative ready "in time" even if we all agreed on an alternative and made a big push for it.

And "all agreeing" on the internet is a herculean task to begin with. Some want federation, some want centralization. Some want memes and others want serious discussion. Some don't even want to leave reddit period.