Eh. I never finished the old games either. But I moreso lost motivation because of the grinding I had to do before the Elite Four and how I utterly couldn't be bothered to. And when I got these games, it was around the time Diamond and Pearl came out, and they were honestly much better to play due to the newer features, better graphics, and more Pokemon. (As well as the Special/Physical split. I don't like playing anything before that.) So I dropped the original Sapphire completely.
As for this one, I didn't play through Omega Ruby too quickly. But not too slowly either. At around the same pace I finished Y, but a bit slower than that.
Just finished Delta Episode a few days ago. It was okay, but it left me feeling empty and with no real sort of emotion or investment. It feels like they were trying to make a good story, but the execution and characters was primitive. It's like these games are taking their baby steps to make a nice narrative and I'm happy about that, but I'm more looking forward to when they refine it into something I can actually be immersed into. (Like Black, Black was pretty good in that regard, although still not the best.) It was... a decent game, but I didn't really have that many expectations for it. I usually don't for a Pokemon game, because I know exactly what I'm going to get due to the fact that they change so little across iterations. And I pretty much got everything I knew I was going to get. Soaring was the only thing that really got me super excited.
Now I'm going to catch all the Legendaries in my Omega Ruby before finally putting it down to go back to my older games and Y so I can get things transferred across generations and organized. I'm more excited to finish White 2 (which I never got around to completing) than I was Omega Ruby, to be honest. Probably not going to be playing much of it once I've completed that task. I just don't like Hoenn that much. Y will go back to being my main game when I restart it and play through it again.
I'm just mostly excited to move away from ORAS and to whatever the inevitable third version will be of Kalos. Already want to get to the next Pokemon games.