^ it’s true. If more people knew, more would do it. It should be a well advertised simple process.
I bought a ten foot tree just because I could. They happened to have a couple extra American Elms from a commercial job so I took them. But most homeowners would at least buy a small one, especially if it’s a proactive replacement and you have time.
Mine took a couple years to catch, which is apparently common if you plant a bigger one but it’s growing well now. Adds a few feet per year. I planted it during Covid and it’s probably 20’ high now.