My hacked up slide system (which I want to dump, I hacked someone else's library years ago) makes a fixed div of size 1024x768, and then uses CSS zoom to resize that to the browser window.
I'm also using it on OS X and Debian. Both work well. And as is recognizable from the git commit history - there's not much that needs to be done over the years to keep it going. Exactly my kind of HTML system - dead simple, no dependencies, works also years later^^
With PowerPoint / keynote and friends, I can be sure all my text will fit on the screen, even if I end up on a stupid 800x600 projector. No HTML framework, except my hacky mess, seems to do that. Maybe resizing mid presentation bothers other people less than me.
Would you be willing to share your hacky mess or make a PR? I really do get what you're referring to now and do think that if you won't contribute, I'll have to write my own hacky mess(;