Re: Cross platform
Early versions of x86 Solaris were a dog with limited support. Later when it got better, it had been displaced by Linux already.
Been there. Did that.
I can't see any serious corporate user going with anything that wasn't officially supported by Sun or Oracle. That means an official build of the OS on Sun/Oracle hardware with a support contract.
Anyone willing to compromise on those points would be just as likely to run Debian.