I think you are pretty wrong now regarding your blog topics … and this mostly has nothing with Toad versions but with Oracle client versions…which in the end determine use of Toad versions.
Let me explain…
If you look in Oracle certification panel, it states something like:
If you use x64 Windows then your Oracle client must be x64 type. According that, if Oracle client is x64, then only Toad x64 is in game (not x32 as you state).
All other combinations (Windows-Oracle) are not recommended and the best of all not certified for any proffi use.
So regardless Toad may work as x32 or x64 on Windows x64, only mentioned combinations should be used in any serious business.
This is why I really adore Toad x64 bit which allowed me to use proper Oracle clients in all mine installations and like before, faking all with wrong oracle x32 versions, which shows some known problems on x64 Windows.
So mine “MUST” is also somehow wrong in a light that all previous versions were using uncertified combination, but we were forced if we wanted to use Toad.