Tx fees going up forever is a big blockers argument, and considered inevitable by many with a shitcoin mindset, because the fees (and other proposed ways to reward miners) have to offset declining block rewards. But, has permanent rising fees played out as block size went from 50 to 6.25? No, it has not, you can still get low fees, although it has been harder lately due to unsustainable shenanigans the latest of which being ordinal graffiti. And the reason fees won't inevitably rise is because the value of bitcoin rises.