One reason(or maybe the common excuse) is often "we need to have full control". That's a reason most managers can get behind.
So that's a common reason slowing every shift to a higher level language or library, to tools that automatically create stuff for you(GUI, optimized code from dsl), to using a platform controlled by another company(one important channel for newer tech, with some strong ux benefits over open-source), to trusting open source.
> One reason(or maybe the common excuse) is often "we need to have full control". That's a reason most managers can get behind.
On modern machines, this excuse is even better. Full control can easily mean 100x difference in speed. Most importantly, how do contemporary lisps deal with arrays of unboxed structs or primitives?
So that's a common reason slowing every shift to a higher level language or library, to tools that automatically create stuff for you(GUI, optimized code from dsl), to using a platform controlled by another company(one important channel for newer tech, with some strong ux benefits over open-source), to trusting open source.