Seems functional and depends on how much you trust the guys behind it. (or compile your own)
Another option is to buy a ltsc win10 license (if you can find it cheap online)
I use the Windows Insider program to run legitimate Windows, and used a bunch of debloat/decrapify programs from Github to try to remove the worst offenders. But damn does Windows Defender and some of the other stuff really ream my resources, and there doesn't seem to be any easy way of permanently disabling them =(
I'd never heard of an "LTSC" Windows either. Interesting.
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EDIT: Ahh it says there's no support for DirectX12, only Vulkan?
I don't know much about this stuff -- I thought it was a software SDK you could just install. But if not, that seems like a pretty huge con:
https://wiki.ameliorated.info/doku.php?id=faq#is_directx_12_...
While it doesn't have telemetry and you can run it as a VM (arguably the better choice, given it's state), it is not Windows 10 by any stretch, and I guess it doesn't run the latest IE version (but I haven't tried it in ages)