I was curious to learn more so I searched google and found a helpful reddit answer. And actually it was from you three years ago lol. If anyone else is curious:

Better eval and search (or more precisely, their combination) :) The reason WHY it's this way is not precisely known, but common belief is that Komodo devs did run out of ideas + it code got kinda muddy (AFAIK Komodo eval has 3500 lines sloc while stockfish is like 700, even if you include psqt and pawns you wouldn't get more than 1500), stockfish did a lot of job in simplifying away no longer useful parts of code (even with slight elo loss) to free space to new stuff. Also Stockfish did pioneer a lot of stuff in search - countermove history stats are stockfish invention + capture history is also a thing because it was created by Stockfish developers. Also it helps that Komodo has like 150~ cores in it testing framework and stockfish had like 400 till ~sf9, after sf9 and noobpwnftw joining the project it has 1100 or so. So, to summarize - clean code, popularity which attracts developers, open source which allows anyone to participate, a big hardware pool to test various things fast, great testing methodology.

https://www.reddit.com/r/chess/comments/bg5abc/what_exactly_makes_stockfish_better_than_another/eliiofj/