ethereum is already unscalable, you can't build a superhighway on a foundation of sand
I don't have a readymade solution in mind. We don't have good tools at the lowest layer. Satoshi took a hatchet to bitcoin script right before he scooted out the door forever. GSR looks very compelling but it's still in the idea phase at this point. This is a great read though: https://x.com/n1ckler/status/1854552545084977320
RGB and that family of solutions scales perfectly well. The issue here is not technical.