AD Maintenance plans look like being phased out.......

I’d buy such a converter!

By the way, relevant to this discussion is a comment posted on the ADSK forum by Kris:

Also, when 2018 comes out, I strongly suggest everyone read the Terms before installing. I wouldn’t put it past AD to stick in “by installing this software, you agree to have your permanent license terminated at our discretion, upon the termination of the license/maintenance model”. Since few read those, it would be just the right kind of dirty trick to do.

So keep your eyes open, folks because anything goes with ADSK. Don’t put a blind trust on them to care for your interest, read any terms from now on VERY carefully before you download or install.