Hey Nicholas,
Yes, an ever returning “discussion” between me and Adobe.
“Growing Files” is something that broadcast digital server based news have been doing for over 25 years, where as Adobe/Frame.io tried recently to sell it as something ground breaking new (except when you want to stream 4K live over I/P to a remote edit suite, size becomes a very important issue).
The “hidden” ingredients, IMHO, is the MXF wrapper as stated on your Adobe link:
“Supported codecs for growing files within an MXF wrapper”
And then: Hardware (storage with I/O) that can handle the speed of a Live Feed, whether it being off-air, or I/P based. There are several companies out there that provides the glue for that to happen.
But my best bet would be to start with your input media, and then your storage solution. Some of the storage companies might even have programmed a PPro plug-in that will do all the work for you.
Hope that this helps.
Atb
Mads