Industrial facilities often maintain decade-old PCs running proprietary machinery software. Modern remote desktop tools fail on these systems due to OS incompatibilities.
Build a lightweight client using legacy protocols like RDP 5.1, with no frills but guaranteed stability on old Windows versions.
Charge manufacturers per-site licenses for critical maintenance access, bypassing IT restrictions.
Start with a modified open-source RDP client tested on common factory PC models.
Risk: Niche market may not justify development; some factories are upgrading systems.