But I qualified with an open question at the end. My initial question certainly can look like your meme but it explains my world view. My follow up question shows I'm open to be taught. You didn't answer the question.

What other scaling options do we potebtially have? What should I be reading about? 

 i only really care about seeing better trust-minimised two-ways pegs.
there’s liquid, there’s the drivechain approach but my preference is pegs permissionlessly enforced by proofs.