We talk about unneeded over-engineering - that's all.
If a road is getting too small and you have space left at its sides, you simply create more lanes - not complex bridges or tunnels and crosses ! (and charge for ppl need to use the safer road) - esp if all the shops and merchants are already built next to that road.

Hey HV? Have you checked out the new Bitcoin Core fork of BCH? There is an 8mb block every 60 seconds! Thats 10x throughput and 10x confirmation speed? Are you switching today? As a big block lover, you will find it absolutely fabulous
https://thebitcoincore.org/ I heard that instead of 0 confirmation transactions, they'll have negative conf. Their wallet AI will anticipate and confirm future transactions before you even send them. And instead of double spend attacks, you'll be able to do quadruple spend.
It's the original vision, yo!