It's not like Reddit was even likely to die. I think we all knew the best case outcome that was still grounded in reality was something like Reddit falling into a slow but certain nose dive.
I mean, even Twitter is still kicking despite all the horrible stuff that's gone on there. Reddit isn't Twitter levels of bad. A slow decline was the best we could have hoped for.
Honestly, we wouldn't have been able to scale to a massive migration, anyway. A slow migration is ideal for scaling and community building.