Haha, also checked the repo and thought the same. We're using F# in prod (about 200K LOC) and it has been great so far. We also use F# for two react front ends

Haha, also checked the repo and thought the same. We're using F# in prod (about 200K LOC) and it has been great so far. We also use F# for two react front ends with fable (F# to JS compiler). More new alternatives for using F# in the browser (FsBolero/Blazer) via web-assembly or running it server side like Phoenix live view also exist. One issue we had with Fabel is how .NET DateTimeOffsets are handled on the Client side.