Tabs are only better for compatibility if you know that no one who touches the code will ever use spaces.
The other thing you need to do is stop people from checking in code that doesn't follow project conventions.
https://github.com/ioquatix/rack-freeze/issues/2 https://github.com/ioquatix/latinum/pull/1
>deliberately have my editor set up to change tab width based on editor width (responsive indentation width)
What editor are you using that has this setting?
Firstly, I've explored using responsive tab width in https://github.com/ioquatix/jquery-syntax which is nice when presenting code on a mobile phone.
Secondly, I've got hard coded tab width on my desktop with a huge screen vs my laptop with a smaller screen, and this works for all editors, including my primary editors Atom and vim.
Finally, I've played around with using responsive CSS within Atom, but due to recent changes in the text rendering my current CSS doesn't appear to be working.
Trivially easy to set up your editor correctly once (if you even need to) and now everyone gets their preferred intenting size