This depends on the definition of "complete". Yes, you've described a pretty comprehensive summary of the web stack and related tools. But this is all application software. What about the underlying network protocols? The OS kernel? The CPU architecture? Cache coherency protocols? Direct memory access to shuffle data to the network card? The physical layer signalling to get this data across the wire? PCB layout? Schematic design? How about the power supply for all this?

A couple decades ago one could actually buy a computer as a kit and put the circuit boards together. And even then it was unlikely that you could know everything: even if you were Woz, you probably would not have seen the masks used to make the CPU.