Mr Eskin's stuff mainly uses the same code (by Paul Rosen) as Paul Rosen's editor, thesession.org and most other recent setups that run in a browser. It works with the ABC code that has been current for years

Being dead is no justification for holding everyone else back.

Someone starting anew will do fine with it - and using software that does support superseded features may lead to habits that cause a problem down the line.