Re: @HildyJ - "We decided on a global fallback"
Actually, I don't work at all. But I have worked for mid and large sized companies that transitioned from stand-alone Wang word processors to Windows 3.1 PCs and from CICS terminals to those PCs. I worked onY2K where we fixed the programs and the databases. I've never done 3.1 to XP but I did work on XP to 7 to 8. I was out of IT when the company went from 8 to 10 but I was managing the contractors who had to upgrade their applications to handle it. Admittedly I've never worked in a Linux shop but I have worked in a Unix shop and, very long ago, an OS/2 shop. What I've never done is work for a company that let the accountants make the IT decisions.