I really like using Google Slides, and whenever I had a presentation, I would just download in all different formats for PowerPoint, so that I cover the compatibility issues, but I have encountered that the PowerPoint export didn't look the same as the Google Slides one, so I highly recommend check the files before leaving your PC!
Isn't that really a problem with PowerPoint as well? If you e.g. use a font that isn't available on the computer you use to present. PDF export solves this, typically.
This avoids any issues with software not loading / messing up (powerpoint) too.