Wow, you came from a long way! Nice to see some old school still being around. While I do not have any experience on game designing on older devices, I still remember using some 33mhz computers with no hard drives at all, spending my nights just creating little programs in DOS 1.0
Project Spark brought something interesting in game designing, where all the hard part was dropped giving the users the ability to focus on their gameplay without worrying about mem allocation, core allocation, real code and stuffs. It's very far from programing, but Kode is a great tool, as you point it, as an entry in the programing logic. It teaches you procedural programing, logic flaw among others and that's what made it a great tool that didn't get the attention it deserved unfortunately.
SparkShare was originally created because I had enough of seeing the "Coming Soon" on the assembly share option. By creating 0.0.1 I decided to add more functions like sharing brains and assemblies and gave a shot at sharing kinect captures (that didn't work, removed) Many other function came, like image importing, chat, messages, liking, stats, links etc etc. And thanks to zgloug, I could make something looking nice too (I'm a programmer, not a designer, you can tell). A couple of events, a demotivation from my side left it the way it is right now. I did not finish the polishing, did not finish the php server side, but it works. You know, I didn't want to inject 200 more hours into it for something like 10 users a month. We tried hard, had some great streams from Team Dakota (thanks Brian and Thomas) and different tries, it never really caught up.
Time will tell, as you said, if it is worth continuing or not. We have a lot of assets in SparkShare's database, and in case it should not continue I will make them public so they don't get lost. SparkShare is just an interface that makes life easier by doing the hard work but is not mendatory to keep ProjectSpark' legacy.
Project Spark was a great game, a good entry into programing, and it can continue even though the servers are down. We can always download it and play it and it's not gonna stop in the near future even though the major part of the community moved to other games, for the gamer part, and to other engines for those that got infected with game development.