[Kuinox]

I would say that program that are run and exit immediatly are a minority of what is produced with languages. A lot of web server, services, gui are produced in JIT languages and have a timespan of multiple minutes. AFAIK FPGA reprogrammation time depends on the size of your edit, and your hardware, the article says that they expect to reprogramm it on a program load, so I don't think it will be that slow.