That "interest" is pretty negligible for most users. I would imagine that 99% of Steem users wouldn't notice this SP increase from day to day or even from week to week, and even with practically no activity.

I notice mine, but only because I occasionally watch it. Even with almost 50K SP, it isn't much "interest" for me. I'd rather cut the overall inflation rate, which is likely a much bigger deal in most people's minds.