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> Is 32GB enough RAM or am I going to be seeing usability issues?

It should be sufficient for quite some time, until you run 15+ VMs simultaneously or so. I reach this limit only when I open too many https links each in its own VM.

> Am I going to take a huge hit in performance if I am running this stuff in a virtual machine like llamafile which runs on the CPU?

Anything relying on GPU gets significantly slower on Qubes (without the passthrough); ordinary apps relying in CPU are fast though.

> I assume you cannot screen share across Qubes.

You can: https://forum.qubes-os.org/t/while-video-streaming-google-me...

> Secondary GPU for pass through is less appealing, but I suppose I can stomach it. Is there a good guide on how you configured this?

https://forum.qubes-os.org/t/create-a-gaming-hvm/19000

> Problems getting web cams or microphones working?

These work reliable for me.

Thanks for those links. That GPU passthrough tutorial still looks like it is going to require some pain.

>Secondary GPU for pass through is less appealing, but I suppose I can stomach it.

Anyone using an Intel CPU from the past ~13 years or an AMD APU or Zen 4 CPU should have an iGPU to render the host with, unless they specifically opted out, leaving the GPU free for passthroughing.

Screen sharing works across the planet nowadays