How to Scale a Blockchain Transaction Process

It seems the only limitation is guess the number of servers that you trust as valid to process their transactions. But I mean, there's really you could just add more computers to do these transactions. The processing pipeline cut out and necessary steps like don't wait for everything to be written to a Merkow tree before you process the next thing. So it's a far more efficient pipeline, right? It's completely different about how blockchain works, right?