Yeah, I agree. While renewables have come a really long way, and are growing spectacularly quickly, energy transitions take a long time.
Oil took 50 years (1860-1910) to get 10% of total world generation, and 30 more years (1910-1940) to get to 25%. Natural gas took 70 years (1900-1970) to get to 20%, and hydropower took more than 100 years (1882-2008) to get to 17%. (Source: Smil 2010, Energy Transitions)
The point is that while we've got the impetus and the technology to move to renewables rapidly, it's still a massive shift, particularly given the sheer demand for energy worldwide today. Then you've got all the other sources - electricity generation is only a relatively small proportion of global emissions.
The Paris Agreement and world governments are banking on there being a way to take carbon out of the atmosphere (less expensively than reforestation) to limit warming to less than 2 degrees. The fact that there's not yet any proven technology that can do this economically and at scale is worrying.
And even if this technology existed, it would raise all sorts of governance issues, like who decides how much carbon is removed from the atmosphere, how is it policed etc..
Making specific predictions about what will happen is foolish, but I'm not optimistic that we'll be able to avoid dangerous climate change.