Find a recycling center

You can built a mesh network out of off the shelf routers.

https://www.youtube.com/watch?v=vVoZppb_FR0

I don’t but that’s beside the point

That’s a terrible design then. I would never want a device that would do that

That’s not something that should ever happen on most devices. If your battery is discharging under load you likely have a faulty device.

It will be a really bad UPS at best

Because it is a safety issue and the battery isn’t designed for that anyway. A UPS is designed to stay charged for a long period of time and laptop is not.

Make sure you have a cooling solution…

What is the motherboard?

I would pull out its guts and then come up with a solid cooling solution for the CPU. Be extremely careful of the battery and make sure you dispose of it properly.

I think you probably should step back and see if there is other options

If it wasn’t connected via PCIe how would it talk to the GPU. Anyway Proxmox does in fact not officially support ARM so that is a pretty miniscule use case. I’m not even sure why you would want Proxmox on a low powered device.

For me PCIe pass though is the easiest. Virtualization adds little overhead in terms of raw performance so it isn’t a big deal. If you prefer LXC that’s fine but my initial statement was based on my own experiences.

iGPUs are incredibly easy to pass though and are PCIe devices.

My setup has no where near that much data. Maybe it gets bogged down with lots of IO.

I will say caching is really important for Nextcloud to be fast

I’ve never ran into issues. Apparently your mileage may vary

What are you trying to accomplish?

Or you could not publicly break the law

In fairness anything is slow on lower end hardware. The tradeoff is that it is very power efficient

It runs fine in a VM with a few cores, 4gb of ram and Sata SSDs

The entire Nextcloud folder is on a network share as well.

ClamAV is good for detecting simple threats. However, I hear it eats ram.

I think the best solution is to use good internet hygiene