Almost every place that has a projector also has an HDMI cable installed. I haven't used a CF card in the last 10 years or so, but SD cards show up frequently.

Almost every place that has a projector also has an HDMI cable installed. I haven't used a CF card in the last 10 years or so, but SD cards show up frequently. (Cameras, Rasberry Pi, Prusa 3D printers). For the Raspberry Pi I needed to use an adaptor because it uses smaller cards, but still better than no card reader at all. But of course that's just my experience. If you use CF a lot, an SD slot won't help.