hsnips VS inkscape-figures

Ah, that's the only downside about Hypersnips... though it's good, the documentation is not enough. I would say if you're aiming to know everything about Hypersnips, see the issue and README in the repo... It's certainly not well-organized but it basically has everything you need to write a dynamic snippet.

I have thought about this, but the thing is if you look closely at the disclaimer section, I use hsnips to handle my snippets. so if you define something like \newcommand{\dd}{\mathop{}\,\mathrm{d}} to make it an operator, I would argue that I can just define a snippet which will expend dd into \,\mathrm{d}. So for me, this is not a big problem and I would like to keep my self-defined operators as minimal as possible, so I just go with plain tex.

As far as I know, you can’t use Ultisnips directly. But there is a VSCode extension called Hypersnips (https://github.com/draivin/hsnips) that is inspired by Ultisnips and translating your snippets between the two isn’t too hard.

Since some of the underlying tools like inkscape-figures-manager and inkscape-shortcut-manager are specific to Linux and macOS (even worse, while the former does support macOS, the latter only support Linux, hence I need to write new scripts with macOS specific tool to achieve the same functionality), so sadly, windows users are left behind...