Do you have one of these information dense powerpoints as a reference? Is there data visualization embedded in the slides? I don't know anything about this so I'm curious.
That is a PDF copy of the actual pitch deck Deutsche Bank used for a proposed trade to take advantage of the 2008 housing financial crash by "Shorting Home Equity Mezzanine Tranches" (an incredible and lucrative prediction they made back in 2007, when the PDF was authored). The real meat and potatoes starts on page 6, but every page after the disclaimer could be put on screen as a slide in a powerpoint.
Note how nearly every slide is a diagram with title and potentially a caption. Each diagram is annotated with custom annotations explaining the concepts at play, requiring a ton of annotations. There's charts, block diagrams, process workflows, tables, and more. A minority of the pages are text-only with bulleted lists. This is an ultra high value artifact and very little of it would have benefited from a markdown->slides automation. What makes it amazing is the sheer volume and detail of very specific information, only replicable via tremendous elbow grease.
I would never be able to design my slides if I used a Markdown to PPT converter.
They are typically 60+ pages slides on something like go-to-market strategy or organizational realignment that the C-level at the hiring firm hired them to do and will forward around to his reports and teams to implement.
Each slide is handcrafted to have a punchy title and be self contained, dense, with links to references and data sources. There's a hefty appendix section so that when someone asks a "what about X?" question, there's a slide in there about alternatives considered and a data-centric reason on why it wasn't or shouldn't be pursued.