Earlier quoted context omitted.
It was great for certain niche applications, like: * The Roxen web server * The Opera Mini backend service (150k CPU cores, 5k servers, 150k pageloads/s, 3 million inline fetches per second, 100+ Gbit/s - 15 years ago) I worked on both of those projects. Now I mostly program in Python. It's perhaps like 10x slower to run on average but since it won there's a module or three for anything so building stuff is faster. Y…
Python won because of its C interface was easy, so it's got Numpy, Scipy, Pytorch, OpenCV bindings, etc. For these use cases, the speed of the interpreter is mostly irrelevant. On the web dev front, Python was lucky to get easy bolted-on async I/O (via greenlets), so it was more performant than Ruby (which was really slow 10 years ago), and Django was less magical than RoR.
Pike's C interface is better in most ways, but of course that might depend on tastes.
Python's easy syntax, accessible documentation, books and tutorials make the learning experience completely different. It's an excellent choice for low-effort small scripts and short-lived projects. It became widespread. At some point it started to be the chosen language in schools. Numpy and django (etc) followed from that.
Pike with modernised syntax (something like Swift?) could have been a contender web-language maybe 2005-2006 at the latest.
Pike's learning experience was always less welcoming. The module tree reference is great though.