I think that's already been done with RSK (if I'm not mistaken). Bitcoin can finally have the capability of interfacing with EVM-based smart contracts. Since the aforementioned solution is a sidechain, Bitcoin's on-chain performance will remain unaffected. Not like Ordinals which are "inscribed" on the main Bitcoin blockchain. There are other sidechains with smart contract capabilities that are dissimilar to the EVM (Stacks, bitVM).
With upcoming network upgrades, I'm hopeful "high fees" will become a thing of the past in the long run. In the meantime, the Lightning Network would be the only solution to keep using BTC without the high costs or long wait times. If only it had a better UX, people would've adopted it by now. Who knows what will happen in the future?