think about it if you were a miner, and have learnt that you can charge XXX for transaction why would you be happy to again charge just one X?
It is certain the more popular coins will increase costs to catch up with bitcoin, as opposed to bitcoin lowering .
Developers are already being pressured to behave in ways that I dare not repeat.
That is one of the reasons why I prefer to trade my ethereum when I want to cash out in fiat, the fee is very low compared to Bitcoin, but it's not high now compare what it was two or three years ago but what i do not like about transacting on Bitcoin is the amount of time you have to wait before it gets confirmed.