Unikernels have long been touted as the next generation of cloud infrastructure for their size, security, and performance — aspects that lend themselves to megatrends like microservices and serverless while combating the non-stop onslaught of data breaches, cryptojacking, and other problems.
There's a big problem though. There has been very little developer pickup. Some of those outside the ecosystem have pointed their fingers at fake problems like a lack of debugging but that simply isn't the reason. For instance, everyone I know that uses unikernels heavily utilizes gdb.