Maybe only a much higher BTC price will stop those ords from infesting the mempool....
Or maybe until people stop buying ordinals and the hype ends. This shouldn't last long, could be just another trend. Currently the only solution is, as stated by many other are using accelerator.
To be honest I never expect that the day will come when Bitcoin blockchain are popularly used to issuing nonsense like NFT. We got enough smart-contract platform to issue NFT, people doesn't seem to feel enough of everything.