diff --git a/slides/demo.md b/slides/demo.md
index e7dd767..a4bea13 100644
--- a/slides/demo.md
+++ b/slides/demo.md
@@ -32,9 +32,33 @@ flowchart LR
 
 ---
 
+## Demo
+
+```mermaid
+%%{init: {'theme': 'dark', 'themeVariables': { 'darkMode': true }}}%%
+flowchart TD
+        B(<b>Disk & OS Installation)
+        C(<b>Desktop)
+        D(Nextcloud server)
+        E(nspawn container)
+        F(Gitlab server)
+        G(Podman container)
+        H(Forgejo)
+        I(MicroVM)
+        J(Kubernetes)
+        K(Splunk)
+        B--> D & E & G & I
+        B-->C
+        E-->F
+        G-->H
+        I-->J-->K
+```
+
+---
+
 ## History
 
-- 2003: a declarative programming language
+- 2003: [a declarative programming language](https://www.youtube.com/watch?v=fsgYVi2PQr0)
 - 2008: first stable NixOS version
 - 2014: 10.000 packages
 - 2019: Flakes
@@ -57,30 +81,7 @@ flowchart LR
 - [Binary cache](https://cache.nixos.org/) for built packages
 - [CI server](https://hydra.nixos.org/)
 - [Build status](https://status.nixos.org/) page
-
----
-
-## Demo
-
-```mermaid
-%%{init: {'theme': 'dark', 'themeVariables': { 'darkMode': true }}}%%
-flowchart TD
-        B(<b>Disk & OS Installation)
-        C(<b>Desktop)
-        D(Nextcloud server)
-        E(nspawn container)
-        F(Gitlab server)
-        G(Podman container)
-        H(Forgejo)
-        I(MicroVM)
-        J(Kubernetes)
-        K(Splunk)
-        B--> D & E & G & I
-        B-->C
-        E-->F
-        G-->H
-        I-->J-->K
-```
+- ...
 
 ---
 
@@ -154,5 +155,14 @@ flowchart LR
     B--> I --> J --> L --> K
 ```
 
+---
+
+## Unexpected stuff
+
+- Flakes are not stable yet, but everybody uses them
+- Documentation quality has room for improvement
+- Additional efforts for secrets management
+- Does not follow Linux Filesystem Hierarchy Standard
+- Commercial software usage can be tricky or impossible