Ive run Roon an many lower end systems just to see what the experience is like…I have 300K tracks…impossible on a 2010 MM even with 8GB and SSD…2014 MM 8GB and SSD took many days to complete analysis.
If you don’t want the greatest Roon experience then by all means run lean on CPU - it wont bother me.
Feel free to read up here…many have been down this road.