Thanks for the reply.
First off for the comment:” Users looking to bridge Thunderbolt 3 back to an earlier version of Thunderbolt is by far the exception in terms of what people try to do with this device. Especially since there are no adapters that allow a Thunderbolt 3 device to connect to a Thunderbolt 2 host, there are only adapters that provide the ability to connect older Thunderbolt devices to a newer Thunderbolt 3 host.”
This might be incorrect. The Apple TB3-TB2 adapter is stated to work both ways, and also it is stated that TB3 is backward combatible to TB2/1 with decreased speed. But, the external device must be a TB device, not only support to connect to a TB3 port.
Thus coming to the last question that was not answered: Will this enclosure be possible to have a (future) firmware update be fully TB combatible ?
Marko.