The capacity for large volume ("real life scale") of transactions with reasonable verification latency is something that I have always seen as the real blocker with Bitcoin. I continue to be slightly surprised that the issue isn't covered more actively.

«global cap of soon to be 28 transactions a second Bitcoin»

Bitcoin competes more against Western Union than against Visa. WU does only 31 transactions per second, perfectly within range of Bitcoin's capabilities (https://corporate.westernunion.com/annual-report/highlights....)

the problem currently has not been the number of TPS but the fact that different groups have incentive to "spam" the blockchain with fluff transactions 1) miners do this to set a minimum floor for transaction fees 2) subversive elements do this to make a point that Bitcoin cannot handle the use cases it was originally intended for

really thinking about this it is probably not a problem because the free market should find the true price for an on-chain immutable transaction. coffee transactions will happen off chain and be settled up on-chain (lightning network)