Shuttle is a very famous name in mini PC’s. They literally made the barebones market their own about 15 years ago. For a long time, small wasn’t beautiful, so for a long time Shuttle made barebones chassis with bespoke motherboards and PSU’s integrated into them. They were, and still are excellent, but they had a market of their own, and only really played within their own market.
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips