It wasn't a tech issue, it was a translation issue. They've showed us that they're okay with breaking compatibility before which makes me think they won't hesitate to do it again.
Honestly, I'd be okay with it. With the way the metagame is now with the current IV and EV system, very few Pokemon can survive an assault for more than three turns. I wouldn't mind if a new system let us bulk up Pokemon a bit more. I don't want GSC stall, but it shouldn't be "whoever hits hardest and fastest" wins. A new system which slows down the metagame would be super welcome from me.
I left my GSC Pokemon behind, I can leave these behind too. (Though I was hoping to migrate my Sapphire Pokemon up into a Sapphire remake. Oh well!)