Story Time!
so we were decomming some 1U full depth HP banshee's at work, did some research and figured i could strip the cpu's (E5-2690 V4's) and ram into an empty Dell r7910 chassis that i picked up off fleabay for about £140
Giving me a Dell r7910 with dual 14core cpu's and 256gig ram. i could have got 384gig in there, but it would have down clocked the ram to 1866Mhz for that extra physical bank of 128gig... anyway... also upgraded the quad 1gig mezzanine NIC card to a dual 10gig SFP+dual 1gig RJ45 card for £50, and i upgraded the front plate to a dual 8x drive bay enclosure instead of the default single 8x. i think that extra drive bay mod cost more than the rest of it all put together by the time i figured out what stuff was compatible with that gen of "PowerEdge" chassis!
I needed the ram speed as was evidenced when i switched from an old Athlon Phenom (DDR2) to a Dell precision T3610 (DDR3), and now to DDR4 platform, that my VM's hosting games benefit massively from ram bandwidth. going from 2channel 800Mhz to 4channel 1866Mhz was night and day performance uplift, 4 channel to 8 channel not so much, but it's nice to know that's not a bottleneck anymore.
I have one Minecraft server VM, two Valhiem server VM's, one VM for home assistant, one VM for a personal windows installation i can remote into from anywhere, one for a web server and one for a mail server for a startup company, and one VM for video grunt work. oh! nearly forgot - one VM for SophosXG Firewall. I don't know if Sophos are doing the free edition anymore, but it's a good piece of kit, if maybe a bit dated now. plus i needed it to host the Sophos WAP's i acquired when we upgraded to Aruba wifi kit at work. however that Sophos means i can't run a pi-hole without monkeying about with the DNS. that'd be fine if i lived on my own. but i have family and guests. Family can't handle it if things don't work, and guest just freak out with automations for things like lights, and fans etc. so Keep It Simple Stupid, as not everyone has a script to flip a vlan for a device if it "just stops working" plugging it into a different part of the house.
Also, never ever run dynamic memory for VM's hosting game servers (or any VM's really)
I've currently got my drives as a hardware raid1 mirror pair of 1TB ssds for the system drive, and a hardware raid 5, 5 drive set of 1TB SSD's for the VM's to live in, and a "hot spare" 1TB drive that'll get auto assigned to any of the raid arrays if a drive craps itself. i love enterprise hardware having this functionality baked in to firmware. this machine is young enough to have a decently recent version of iDrac baked in as well.
i HATE windows server "storage spaces" it just seems to amplify the negative aspects of multiple drive management, with no real upsides. if the OS volume craps itself, then you loose your storage spaces data drives as well. yay. that was fun. Thanks Microsoft. One damn reg key in windows2019.
apps that will be running natively on the host OS when i get some data drives for the new box to take over file server duties - will be "drive bender" to manage the data drives into a single storage volume, and EMBY to farm out all the hosted media to the TV's and stuff around the house.. just need those 8TB sata ssd's to come down in price instead of going up and up and up like they have been of late...

those 4TB spinners on my current Dell T3610 file server are not getting any younger)
home assistant is good. you can run it on a pi, though a pi will start to choke if you start bringing in a lot of camera video feeds. so sticking homeassistant in a VM on something with some horsepower will benefit it massively here
i did have this grand vision of hosting everything in the server rack, sat boxes, games consoles, BR players, PC's you name it. even bought a load of "JustAddPower" HDMI over IP gear. started to get it kinda hung together, then streaming kicked off which means every TV just needs a cheap firestick/appletv/googlesomething and you install all the apps on there you want locally on that device, and you're done. HDMI matrix switchers are seemingly redundant - be they direct HDMI, or HDMI over IP, or whatever.
All you need in your server rack now is a server, a switch, and some patch panels. the server doesn't even need to be monstrously powerful looking at some of these pi Nas'es...
Sonos/alexa/google/bose/sony/even apple? have their own walled gardens for multiroom whole-house audio, again, integrates with homeassisant. i mean ok sure, so you're locked into a single vendor's eco system. but at least that eco system doesn't need you to call out a crestron or control4 engineer to add/remove devices/modify your configuration at ££££$$$$ per hour.
N.B.
anyone want some JustAddPower HDMI-over-IP Gen2 kit?
sorry for the brain dump