Still don't get it. There is no need to have Windows XP, Ever.For the most part, totally true. Serial adapters are totally a thing, and you can get them for almost nothing. Software is where the pain can lie. Sometimes it can be worth rebuilding an XP machine if it means saving a few thousand bucks on a machine that is already on the short list for replacement.
You Should just say: "I do not know reliable way..." because someone does.The Oce Arizona I have runs XP for the control system. No reliable way to go to a newer version. Always edge cases.