"Old unpatched OS" - Current Mac Pro's will likely have a minimum of 5 years of OS updates; probably 7 with Apple's past history, especially with the PowerPC to

"Old unpatched OS" - Current Mac Pro's will likely have a minimum of 5 years of OS updates; probably 7 with Apple's past history, especially with the PowerPC to Intel transition. Power PC Macs had a LONG lifespan. Longer than the market that want's a Mac Pro keeps machines in production, anyway. Especially if the Apple Silicon Mac Pro's paste the Intel ones. Companies will change them out in a heart beat if they deliver solid productivity gains. Time is money is more than a pithy saying.