I don't think your car engine can grow to consume gas at a faster rate or spawn other engines that consume gas. I don't think the OP or this article is saying it will completely eliminate global warming, but a new equilibrium where co2 consumption by plants pushes back and holds the line at some point seems plausible (hopefully before we reach something like this before we turn into a venus).

I'm looking forward to the return of megaflora. Too bad I won't be here to see it.

Plant life grows exponentially and can catch up to our additions of carbon.

If it was that easy, we would never have switched from charcoal to coal.

Every exponential has a limit, and in the case of plants the old limit might the pre-industrial or possibly pre-agricultural equilibrium. How much can grow now depends on not just the atmospheric CO2, but also plants and animals we have selectively bread, the canals we’ve built, the the phosphate we’ve mined, the mountain tops we’ve removed to make mining easier, the glaciers we’ve melted, the storms whose frequency we’ve changed, the aquifers we’ve emptied, the lowlands which have become salty from the sea level rises, and almost certainly a lot more besides. (Edit: and if the zooplankton which human activities ultimately encourage produce waste which floats or sinks, the latter being a way to remove carbon from the system, the former puts it back in the air).

Some of that pushes the equilibrium up, some down.

Not if it runs out of nitrogen in the soil - and we're already supplementing that for our crops. Then there are also limits on water, sunlight and space.

Sure, life will adapt and overcome - over time. But evolution won't save us here, as we're altering the climate orders of magnitude faster than natural selection runs its OODA loop.