Change for the better. Big 4 is a lot different.
Big used to provide a bunch of utilities: big-compose so you could write presentations in Markdown, big-offline so you could make them work offline, big-init to start presentations, big-serve so you could serve them. I removed all of these.
I removed big-compose because I never used it, and it was never possible to do everything in Markdown, especially not layouts. Big is opinionated software: in particular, my opinions, and those I acquire from smart people along the way. One of those opinions is that HTML’s a pretty good language and if you aren't writing a lot, it’s perfectly usable as a markup language for text.
big-offline was cool, but I recommend using your browser’s “save webpage” feature instead, which produces a more efficient result and you already have in your web browser. I really recommend making your presentations work offline by default, too, by uploading images and keeping all your resources close.
big-serve was just a HTTP server. I don't underestimate the difficulty of setting up an HTML server for a lot of folks, but those folks are better served by double-clicking the index.html file, and local servers are really good in other projects, like the serve module.
big-init should just be a download. Now it is.
It was a really cool feature, but I have a suspicion – and hard data — that almost nobody used it. Big is about minimalism, and niche features cut against that.
The San Francisco font included with macOS is really good. Web fonts just rub me the wrong way, and I’ve tried really hard to avoid them in new projects – they’re big binary dependencies that make everything more complex. You can really use web fonts in your presentations, and please do if you find one you love, but it wasn’t a good default.