Results like not worth the effort, though it can be done now as a crossgrade much more easily. I had tried the dbootstrap method. Almost got there but ... had to restore.
The main question is whether 32 bit packages will be gradually phased out. One can already find missing pieces. If this be the case, then some regular, orderly upgrade path for everyone will be needed. But then again, strength of Debian was that it ran on the older clunkers as well. Need to know some objective conclusions here.
