What porting? GNU/Linux already runs on ARM. PHP and MySQL already run on GNU/Linux. Dell is forgetting that any porting costs are a minimal one-time thing but the energy/cost savings last the life of the server. Perhaps they were thinking of that other OS which is just now being ported to ARM. Dell, don’t wait for M$’s vapourware. Sell ARMed servers on price/performance.
Dell is not the only company that has allowed M$ to dictate technology and it won’t be the last but this is the 21st century and there is no excuse for this lack of vision. We have seen it all before.