Both is trivial in my opinion. The problem is OP using ancient software that only runs on an ancient OS. In this case upgrading is not trivial. Even though upgrading is a major investment in this case, it only gets worse the later its done. Typical case of technical debt
I wouldn’t say upgrading the OS on a phone or tablet is trivial… Especially when compared to a PC. Upgrading the OS on a PC is much easier.
Both is trivial in my opinion. The problem is OP using ancient software that only runs on an ancient OS. In this case upgrading is not trivial. Even though upgrading is a major investment in this case, it only gets worse the later its done. Typical case of technical debt