Hi, CC!  Good to see you!
Yeah, Dutch Elm Disease is still around unfortunately, but they do have some treatments now I think, so I believe if you catch it in your established trees and call an arborist, they can kill the bugs or the fungus or whatever - I'm not sure exactly what the treatment is.
Yeah, I love Emmy the Elm Tree - and she inspired me to try growing other trees in pots.  I had a couple of starts that then fried last year when I had to move them temporarily to a different spot (literally, the front of my apartment instead of the back on the balcony) - they were too little to take the sudden swing in sun levels, I think.  But I keep trying.  It's a learning process. ;)