Questions about using gnunet to build an application

[Lily]

Hi! I've been evaluating gnunet for one of my personal projects and I had a few questions:

• I saw in the docs that gnunet uses proof-of-work in a couple places (NSE and Revocation), would this work well on something like a smartphone? If not, are there alternatives in the works?
  
• Does the messaging application guarantee consistent ordering of messages across different nodes?
  
• I saw there was a social subsystem in the works, is there any information about that public?
• How stable is gnunet, is it something that could be relied on to build a stable p2p application on top of today?
  

Thank you so much!

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