Gas, oil and coal demand is reducing globally; however global investment in fossil fuels is increasing, albeit at a far lower rate than renewables.

For coal the summary definitely seems to support the reduction in themand, but at least for the next few years gas and oil still seem quite stable to me.

I suspect this is driven by third world countries, where the initial cost can put off investment in renewable infrastructure;

Shouldn't it be the other way around, particularly for solar? Easy to set up, cheaper, flexible to scale, and the more decentralized setup might even help with poor electricity grid, since you can just set them up whereever needed and even have them work insular without connection the the network.

Also this report suggests that energy production from coal, gas, oil, hydro and nuclear have starting to plateau from 2021, with solar still showing an marginal increase alongside wind, bio energy and ‘other’: https://ourworldindata.org/grapher/electricity-prod-source-stacked

Imo the recent events have made it a bit hard to judge trends just from a few years. 2021 you are right in the middle of covid screwing over global trade, following that you have russia invading ukraine and the subsequent shift in europe (will be interesting how that plays out once the conflict ends), and as the main article of this thread suggests hydro was heavily affected by recent droughts (although those might become the norm). Only nuclear might be somewhat easier to extrapolate, since new capacity doesn't just magically appear, but involves long term planning.