Well, combining alexcoppo's excellent description of the reasons why bryce's code is probably a nightmare with the fears of some people about mergers between carrara. And the statement about 64bit version needing demand..

I'd get the following conclusion:

• Bryce's code is ancient, headache to work with, half-rebuilt for 6.0/6.1
• 15 developers dont get much feature progress, thus, they spent ages trying to understand the code, then rebuilding seemed to take rather long.
• 64bit probably requires some significant rebuilding = headache as illustrated by the conditions of both previous points.
• Bryce isnt that much of a memory hog, thus there is less prominent need for 64-bits.
• Cararra does most of what bryce does, with (apparenlty) much cleaner code. Merging its code base with that of bryce would only degrade cararra's code quality. Either that, or it would take a lot of effort to clean bryce's code.

Thus; depending on how much rebuilding was done for version 6 and how high the quality of this new code is, bryce is either best of as OSS, or set to die within 2 mediocre minor updates at best.

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