Subdivision modeling to multi-res sculpting workflow. Pretty powerful and something you might like. Visit my website for links to my assets, addons, the discord, and other useful resources. www.pzthree.com/
Amazing +1 subscriber. Very good, very informative, I see lack of good subd workflow. Would be nice to see more about topology in subd. Please don't stop. :)
You actually don't have to remove them. However, if you push the center vertex out to the next vertex. They would be quads. Difference is how it is subdivided. Ngons= epole. Triquad = npole or a combo of both. Check the end results, turning optimize display off in the subd modifier.