AKA Iron Wood for all the reasons above . it grows large around here and the only timeEastern Hop Hornbeam is a very impressive firewood but its pretty rate to see anyone selling it. https://www.bates.edu/canopy/species/eastern-hophornbeam/ Its super dense, when dry its but rarely gets big enough to split it anymore than in half. Its pretty rare in woods being pretty particular on where it grows and once its cut it takes a long time to regenerate, if it ever does its in someone else's lifetime. Its not shown on most charts but this one has it. http://firewoodresource.com/firewood-btu-ratings/ Its one of the highest btus/cord from a density basis and 8% more btus when dry than the oaks and beeches. I expect it is usually only cut when someone is clearing a lot or it gets mixed in with some nearby hardwoods. I expect for my northern climate its the ultimate all night wood.
Trades offs are it feels like a brand new out of the box chain is dull when cutting it green, when dry its worse. It has supertight grain as it usually grows under a closed in canopy in my area. If it grew into a bigger diameter it would make a great splitting block as its will not split by hand even though its straight grain. A dual stage splitter can usually split it due to the smaller diameter rounds but expect it would be one reason why a 30 ton splitter might be useful. Some folks use it for handles on things like Peaveys where ash may not be strong enough. It makes lousy ax handles as its "dead" somewhat similar to an aluminum baseball bat compared to an wooden one. I have seen some pretty impressive mallets made with it.
I have some small patches in the understory of maples on my property. I usually find it on steep bony slopes where they may be some openings in the canopy due to ledges and boulder fields. I expect I would be hard pressed to get more than few cords out of some of my patches so I leave it alone unless its in the way and when I do find a piece mixed in I just buck it and let it dry without splitting. It does have an interesting grain but its hard on circular saw blades and high speed steel jointer blades. My carbide insert jointer blade handles it as long as I use a very shallow cutting depth. Reminds me of some of the dense tropical woods.