The only thing we have power over now is determining how severe the building catastrophes will be. If we can mobilize radical efforts in the next ~4 years we may avoid the worst case scenarios. But that doesn't mean we'll be hotly anticipating the next smart phone and enjoying next-day delivery in thirty years. There will still be mass extinctions, large swathes of the surface of Earth will be inhospitable to humans, we will live with constant wildfires and super storms... regardless of what we do now.
I'm not a gambling sort of person so I don't plan on getting lucky. It sure would be nice if some genius out there invents a technology that magically reverses everything. However that's not a likely outcome.
I think we need to look forward to surviving. It's not going to be pleasant but I do remain hopeful that it will be possible.