Minor corrections, new sfp pic

slides/content.md

@@ -588,13 +588,14 @@ apk:
 |   | €/GB | R/W Speed | Lifetime |
 | - |:---- |:--------- |:-------- |
 | HDD | Low | Medium | Medium<br>(3-5 years) |
-| SSD | Medium | High | High<br>(20+ years) |
+| SSD | Medium | High | High<br>(10+ years) |
 | SD/eMMC | High | Medium-Low | Short<br>(1-2 years)|
-| Cloud | - | Internet Speed | Infinite |
+| Bluray | Low | Medium (RO) | Extreme (100+ years) |
+| Cloud | - | Depends* | Infinite* |
 
 ---
 
-## SBC ARM/Router
+## ARM SBC/Router
 
 <div style="display: block; margin: 0 auto">
     <img src="assets/rpi4.jpg" style="max-width: 27%">
@@ -605,7 +606,7 @@ apk:
 * Cost: 20-100€
 * Computing power: Medium-Low
 * Storage: scarce/decent
-* Power consumption: > 10W
+* Power consumption: 5-15W
 
 ---
 
@@ -625,7 +626,7 @@ apk:
 
 * 1-3 have usb ports behind a hub
 * 1-3 have ethernet behind an usb adapter<br>(guess where it is attached?)
-* Wifi tends to be very crappy without
+* Wifi/BT share an antenna, better result achievable with
   an u.FL connector and a proper antenna
 * Computing power is generally lower than
   competitors for the same price point
@@ -645,7 +646,7 @@ apk:
 * Cost: 50-200€
 * Computing power: Medium-High
 * Storage: usually quite decent
-* Power consumption: 10-50W
+* Power consumption: 20-50W
 
 ---
 
@@ -672,7 +673,7 @@ apk:
 
 ---
 
-## Is there such a thing a too much hardware?
+# Is there such a thing as too much hardware?
 
 ---
 
@@ -723,7 +724,7 @@ How do we connect to the internet?
 
 <img src="assets/fiber.jpg" style="max-height: 30%" />
 
-* New technology used for FTTH (1 GB/s internet)
+* New technology used for FTTH (1 Gb/s internet)
 * There is a direct optical link between the end user and the ISP
 * Since the transmission is optical, no interference!
 * Optic fiber crimping has some tooling costs (~200€)
@@ -739,7 +740,7 @@ How do we connect to the internet?
 
 A ONT is a device that bridges a fiber link to ethernet  
 (allowing us to use any device we want as a router)  
-AFAIK there is no ONT with OpenWRT support
+There are only couple of ONTs with WIP OpenWRT support
 
 ---
 
@@ -770,7 +771,7 @@ to a mundane wifi router
 
 At the end of 2018 the AGCOM (italian telecomunications agency) approved
 a set of rules that forces ISPs to provide appropiate means to allow consumers
-to choose their own router (ONT are still part of the ISP's network)  
+to choose their own router (ONTs are still considered part of the ISP's network)  
 Obtaining the various settings for connecting to the ISP's network varies
 by difficulty and amount of call centers you have to contact based on the ISP you pick  
 _(there was also a clause that allowed consumers to have a vendor-neutral firmware