I have to be careful about what I say here, but if you read between the lines here I think you will understand what I'm getting at: VMware plans to deprecate vmkLinux APIs and associated driver ecosystem - VMware vSphere Blog
So anything without a native vSphere driver ***MAY*** not working in future versions of ESXi. From my research so far I have found that there are no native vSphere drivers for LSI SAS controllers older than the 3xxx series, so they will be affected by this unless Broadcom decides to develop a driver for older hardware.
More information: What is the Impact of the VMKlinux Driver Stack Deprecation? - VMware vSphere Blog
So anything without a native vSphere driver ***MAY*** not working in future versions of ESXi. From my research so far I have found that there are no native vSphere drivers for LSI SAS controllers older than the 3xxx series, so they will be affected by this unless Broadcom decides to develop a driver for older hardware.
More information: What is the Impact of the VMKlinux Driver Stack Deprecation? - VMware vSphere Blog