Hosting: Read-only-ready theme? And a single-file time-to-load question

I’m afraid I don’t have any personal experience with either static site conversions or Node.js, but my understanding from the documentation is that you would need to switch to a Node.js setup. It’s possible to convert single-file wikis to Node.js projects and vice versa (and there may be TW clients that simplify this process) but it might be tedious to do so on a regular basis, and I’d also be concerned about keeping both versions in sync.