None.

X-Plane comes close to FlightGear. It has far-superior visuals. fully functional glass cockpits like the Garmin G1000, and simulated ATC, but the vast array of community-made planes available in FlightGear still kinda seals it for me, despite the jank.

FreeCAD has its pain points. Software like Creo Parametric is much more robust in a lot of ways, but I literally cannot run it on Linux (no mouse-wheel zoom in WINE, slide show in QEMU). Fundamentally, they are similar enough, and my work primarily takes place on a component level so I can live without the streamlined assembly workflow. Also, FreeCAD doesn’t cost >$2000, and can still do FEM analysis and computational fluid dynamics. Maybe I could find a crack for SolidWorks and try that out, but it takes a long ass time to learn a CAD system proficiently.

Everyone who learned on Photoshop says the GIMP interface is weird, but I learned on GIMP and can say the same for Photoshop.

Games are the only exception, but games aren’t fungible. Minecraft is not a substitute for Dwarf Fortress. CS:GO is not a substitute for Unreal Tournament.

Basically, on Fedora you are a guinea pig for whatever new tech Red Hat (now IBM) is considering rolling out. It is a well polished distro and I have set it up on several people’s computers, but they will be among the first to just foist a whole new replacement subsystem on their users. Can be interesting if you like experimental shit (and what comes to Fedora tends to stick around [i.e. PulseAudio, systemd], unlike a lot of the shit Canonical has tried to introduce [i.e. Upstart, Mir]). Can be a major headache if you are trying to use something which requires iptables and they have jumped into nftables with both feet (for instance).

You can pry gentoo from my cold dead hands. The ability to do things like mix LTS and git HEAD packages at will is yuuge, as well as the dynamic dependency graph based on enabled features. Some newer distros like Nix and Guix come close, and even offer the ability to skip compilation via their package caches, but they have a number of pain points in my personal experience.

This might be possible if you can configure your computer as a bluetooth audio sink, link a second device to it, mix the audio, and then connect your headphones to the computer. Never tried or looked into doing this though. It will need some third party software to pull off if you are using Windows, or some manual configuration if you are using Linux.

It won’t be convenient, but it can be done.

Setting up email is a fuck. Every once in a while I check the mail server for my mastodon instance and there’s always sign-up mails which were undeliverable. The server is only on two block-lists and those block-lists block the whole IP range because it is a VPS host. Most providers work, but iCloud and ProtonMail in particular reject everything.