I'd lean towards a view that those are long-term outcomes that might take thousands of years to materialize. But things like ocean acidification and permafrost

I'd lean towards a view that those are long-term outcomes that might take thousands of years to materialize. But things like ocean acidification and permafrost methane release are currently looking unstoppable. Canada and Russia becoming new bread baskets is a possible near-term future, but you'll have a lower total amount of incident input energy at those latitudes, meaning that even greater arable land areas will produce significantly less food.