Yeah, at that time we wanted a new iPhone, but I specifically avoided the iPhone 6 series because of the RAM. So glad we did, as the 6s was so much better with its 2 GB RAM.
Similarly, as nice as the iPad Air looked, I specifically avoided it because of the RAM. I waited for the iPad Air 2 with 2 GB RAM, and as a bonus it got an extra CPU core too, in A8X.
I did buy the M4 iPad Pro with its 8 GB RAM, but so far that's been OK for my needs. However, we are holding off on the regular iPad, waiting for an expected RAM upgrade in 2025 for the iPad 11th generation. The current 10th gen has 4 GB but hopefully the 11th gen will have 8 GB RAM (because of AI), but I personally would be satisfied with 6 GB RAM too.