I have a T580 with nVidia graphics. Repairability is great. You can find a manual with step-by-step instructions for every part online.
But the thermals in that thing are awful. Especially on Linux and doubly so with the GPU. It has some stupid on-lap detection which heavily throttles the system to not burn the user. Up until a few years ago there wasn’t a driver for Linux so it always defaulted to on-lap-mode. But even worse, the GPU has some hardcoded 70° limit and it throttles down to the lowest clockrate when it reaches that. And it reaches that quickly because CPU and GPU share a heatpipe.
Nowadays I just run it on the integrated Intel graphics on Wayland and it’s great. But it would be cool if I could use the GPU that is at least theoretically able to run Doom 2016 at 30 fps. But practically it struggles with Quake 3.
It’s just a shame that you probably won’t know about these kinds of problems on a new laptop because people only notice them after a few months to years.
I once built a home theatre PC that was completely passively cooled. The case was basically the entire heat sink. It got the heat from the CPU through heatpipes. Unfortunately the shitty motherboard died due to unreleased reasons and since then I didn’t have the time or money to revive it.
The cases aren’t even built anymore. No idea why, it was really cool.
You’re supposed to use distilled water which is not conductive. At least that used to be the case last I saw liquid cooling.
In the end it’s simply not worth it for me. You still need to radiate the heat out, which usually means a big fan, which most air coolers nowadays have anyways.
In the Networkmanager you can set that a connection is either available to all users or just yourself. If you set it to “all users” its configuration will be saved somewhere in /etc/Networkmanager (I’m too lazy to look up the real path) and will therefore be available for Networkmanager on boot. If you just make it available for yourself Networkmanager will only attempt to connect after you log in.
I think the default is to make it only available to yourself, because then you don’t have to enter your sudo password when you set it up or want to change something. The downside is of course what you describe in your post.
Teleportation every time. It’s just too useful. Invisibility is really only useful for mischief and security. And both can also be done with teleportation.