The problem is that these kind of applications suck for multi-tenant clouds which FPGAs turn out to be poorly suited for (high costs to switch out programs) and

The problem is that these kind of applications suck for multi-tenant clouds which FPGAs turn out to be poorly suited for (high costs to switch out programs) and are too expensive for the consumer. So the applications are quite niche and limited to traditional use-cases of prototyping ASIC designs rather than actual algorithm accelerators which benefit more from dedicated circuitry/instructions in terms of adoption.