What operating system are you currently running?

[Fallenbagel]

Laptop (Daily driver): Windows 11 & NixOS-WSL2 (Mainly on NixOS-WSL2)
Laptop (Test-bench): Arch
Server: NixOS
RPI: Alarm (Arch-linux arm)
VPS: NixOS

[hobbes]

Desktop: Windows 7
Server: Windows Server 2008 R2
Router: OpenBSD 7.2

[rigrig]

Laptop, work desktop: Linux Mint 21.1
Server: Debian 12

Edit: upgraded my server to Bookworm 🥳

[Shadowghost]

Desktop (Daily Driver): Windows 11, Ubuntu via WSL
Desktop (Test System): Debian 12 and Hackintoshed macOS 13
Laptop: Windows 11 and Pop! OS
Servers: Debian 12

[saucytuna]

Laptop — macos
Work PC — Windows 10
Server — FreeBSD (TrueNAS Core)

[Buzzkillingtonne]

Desktop: EndeavourOS
Laptop: EndeavourOS
Wife's desktop: EndeavourOS
Work laptop: EndeavourOS with Windows 10 dual boot
Work desktop: Windows 11
Steam Deck: SteamOS
RaspberryPi's: RaspberryPi OS, retropi
VM/LXCs: Mostly Debian 11 and the odd Ubuntu 20.04, one EndeavourOS install running steam with a GPU passed through for SteamOS like experience on the livingroom TV
Baremetal Servers/router: OMV, Proxmox, OPNsense, Proxmox Backup Server

[Patrick1945]

Jellyfin Server 1&2: Windows 11 Pro for Workstations
Torrent Server: Windows 11 Pro for Workstations
Laptop: Windows 11 Pro for Workstations

[hov]

Server: OpenMediaVault + docker containers for most things

[felix920506]

JF Server: Ubuntu 23.04 Server
PC: Arch Linux
Laptop: MacOS 13
NAS: TrueNAS SCALE

[34626]

Main PC: Abook Z510 with Ubuntu Mate 22.04
Main server: Intel NUC N5105 with Debian 12
Other small servers: Raspberry pi 4 with Raspian (Debian)

Else it's Chromecast Ultra and tablets with Android being used in general with the Jellyfin server

Have mutiple apps for Jellyfin, but primary using Jellyfin and Finamp