A custom PC running proxmox:
MOBO: Asus ROG Strix Z790-E gaming wifi
RAM: 4x 32GB Ripjaws S5
CPU: i9-13900k
GPU: Gigabyte RTX 4090
GPU2: EVGA GTX 1070
HDD: 4x 8TB WD red plus in raid 10
SSD: 2x 2TB Samsung 980 pro in raid 1
PSU: Super Flower Leadex Titanium 1600 W
Case: Fractal Design R5
I run everything on it: homassistant, Plex/*arr, pihole/unbound, my windows gaming VM, etc.
I actually did go with the route of using a desktop as my server. I custom built it with the expectation of it being a server I would remote into for games. I have proxmox on it with a windows VM I remote into with parsec instead of sunshine. It allows me to keep a light laptop while still getting the beefy power of a desktop.