I don't know if it's inevitable, but it's clear at this point that people are unwilling to pay $ for access to the content in the forms we know now. I think until we find a better way of having people pay for content and curation, we're likely to see this happen again. That said, Reddit has (so far) lasted a decade on the throne, which is a third of the life of the www. It's not like there's anoter competitor sitting there ready to dethrone it so I suspect it's here for another while.
So I think it's relatively clear that Reddit doesn't _want_ to reach some kind of deal with 3rd party apps, but honestly, I think that if they _had_ wanted that, most of these apps could have survived with a much smaller userbase of paying customers. I would have paid the $3-5/month it would have cost to keep my preferred app. And while yes, it definitely would have been fewer people, my guess is that it would have been enough to worth continuing. And if Reddit had been willing to figure out some kind of deal with ads, it might have been even more.
When was a last time a big and popular social mediaish or like platform properly died? Media companies have not survived, but platforms seem to have been sticky or then I just haven't used them.
