2014-05-20 17:21 GMT-03:00 Nicolas Cellier <nicolas.cellier.aka.nice@gmail.com>:

> If we are prepared to see it failing, it does not really matter, it's in the
> contract...
> The only problem is to be aware of this contract and avoid negative
> impression.
> Maybe an advanced menu triggered by some preference?

Or a one liner:
Smalltalk upgrade

Possible with a warning (muteable) to avoid unintended executions, and
enable unattended (i.e. scripted) upgrades.

Regards.