There was only 1 day to convert over to SAT2? Is there no other way to convert my old SAT?
Sorry but you missed the boat, although quite how, I don't understand. There was like one date that you had to remember or you could have just left your SAT on one of the exchanges and you wouldn't have to do anything. Ask the devs if they can help but I think it's too late now.
It can't be too late given that some are still mining the old SAT
We are accounting for that, but do note that we will still need to cut off the conversion eventually. Just as an example: consider the last block. At that point, the blockchain essentially stops, meaning there is no way to send transactions anymore at that point. So it would be impossible to get those coins converted.
Additionally, we also have to account for the security of the old blockchain. The hashrate on the old blockchain will get lower and lower, which also makes it less reliable (the lower the hashrate, the easier it gets to pull off a 51% attack). So at some point (we have not yet specified an exact time, but it won't be long) we simply cannot guarantee the security of the old blockchain anymore. Just to be clear: this is ONLY about the old blockchain of course, the new SAT² blockchain is fully supported

Was chatting with Bryce earlier on IRC about this. I currently account for over 30% of your network hashrate ahnd have done since you launched the new chain. He said he reviewed your code and thought your plans were really interesting and was looking forwards to seeing oyur developments (he didn't release any info on what you had planned). Looking forwards to seeing what develops as with my old sat conversion and mining the hew chain I have accumulated a lot of coins.