IPP 11 was the first time I went with Apple's base storage model. I found that I never had a problem keeping things in check with my 6S' 64GB so I thought "why pay more?".
Still have over 20GB left. All space-saving features enabled and I find that in my use case, this works great. Old apps gets uninstalled (and can easily be reacquired with a tap like if they were always there), photos are seamlessly downloaded from the cloud when I pinch to zoom. It's all fine. YMMV.
It's surprising how much space podcasts take up on my 64GB SE2. I'm constantly have to delete old episodes to make room. My phone next will definitely have to be at least 128GB.
I use Overcast as my podcast player and have it set to only keep one episode of each podcast on-device. I don't have the need of keeping a bunch of audio files on my device when it's always connected and those podcasts easily can be streamed on-demand like other media.