Heaps of server side tools are truly cross platform, but I was talking about avoiding proprietary platforms in the first place, which means no windows, or at least no windows tech that doesn't conform to open standards.
Typically business will build there own software on top of MS (or oracle, or <insert cloud platform>) tech as well, locking them in further to several years of "investment".
Typically business will build there own software on top of MS (or oracle, or <insert cloud platform>) tech as well, locking them in further to several years of "investment".