feat: minor updates on intro

docs/introduction/advantages-and-disadvantages.md

@@ -33,7 +33,7 @@
 - **High Learning Curve**:
   - Achieving complete reproducibility and avoiding pitfalls associated with improper usage requires learning about Nix's entire design and managing the system declaratively, rather than blindly using commands like `nix-env -i` (similar to `apt-get install`).
 - **Disorganized Documentation**:
-  - Currently, Nix Flakes remains an experimental feature, and there is limited documentation specifically focused on it. Most Nix community documentation primarily covers the older `nix-env`/`nix-channel` approach. If you want to start learning directly from Nix Flakes, you need to refer to a significant amount of outdated documentation and extract the relevant information. Additionally, some core features of Nix, such as `imports` and the Nixpkgs Module System, lack detailed official documentation, requiring resorting to source code analysis.
+  - Currently, Nix Flakes remains an experimental feature, and there is limited documentation specifically focused on it. Most Nix community documentation primarily covers the classic `/etc/nixos/configuration.nix`. If you want to start learning directly from Nix Flakes(`flake.nix`), you need to refer to a significant amount of outdated documentation and extract the relevant information. Additionally, some core features of Nix, such as `imports` and the Nixpkgs Module System, lack detailed official documentation, requiring resorting to source code analysis.
 - **Increased Disk Space Usage**:
   - To ensure the ability to roll back the system at any time, Nix retains all historical environments by default, resulting in increased disk space usage.
   - While this additional space usage may not be a concern on desktop computers, it can become problematic on resource-constrained cloud servers.

docs/zh/introduction/advantages-and-disadvantages.md

@@ -32,7 +32,7 @@
 - **学习成本高**:
   - 如果你希望系统完全可复现，并且避免各种不当使用导致的坑，那就需要学习了解 Nix 的整个设计，并以声明式的方式管理系统，不能无脑 `nix-env -i`（这类似 `apt-get install`）。
 - **文档混乱**:
-  - 首先 Nix Flakes 目前仍然是实验性特性，介绍它本身的文档目前比较匮乏, Nix 社区绝大多数文档都只介绍了旧的 `nix-env`/`nix-channel`，想直接从 Nix Flakes 开始学习的话，需要参考大量旧文档，从中提取出自己需要的内容。另外一些 Nix 当前的核心功能，官方文档都语焉不详（比如 `imports` 跟 Nixpkgs Module System），想搞明白基本只能看源码了...
+  - 首先 Nix Flakes 目前仍然是实验性特性，介绍它本身的文档目前比较匮乏, Nix 社区绝大多数文档都只介绍了旧的 `/etc/nixos/configuration.nix`，想直接从 Nix Flakes(`flake.nix`) 开始学习的话，需要参考大量旧文档，从中提取出自己需要的内容。另外一些 Nix 当前的核心功能，官方文档都语焉不详（比如 `imports` 跟 Nixpkgs Module System），想搞明白基本只能看源码了...
 - **比较吃硬盘空间**:
   - 为了保证系统可以随时回退，nix 默认总是保留所有历史环境，这会使用更多的硬盘空间。
   - 多使用的这这些空间，在桌面电脑上可能不是啥事，但是在资源受限的云服务器上可能会是个问题。