I recently got FF7 (original) for Switch and have been playing through that hard. KotR was nearing mastery and I figured I'd double check to make sure I hadn't missed anything. I missed Ramuh. There's no way to go back and get it and my only earlier save is just after Temple of the Ancients. I won't be able to make my own Master Summon Materia. I was just settling into the final grind/side quests. Guess I'll have to slot another full playthrough sooner than I had anticipated. On the plus side, there's so much more information readily available than when I had played decades ago and I've learned a few new tricks. And being able to speed up most stuff to x3 speed has been great.