Considering gaming floor connectivity, the future has effectively already been here for some time. Serial connections are all but a bygone technology, any vendor worth their salt now supports Ethernet for EGM connectivity.
Last updated: 2021-3-22 (fix Filecloud forum links)
FileCloud is an enterprise grade file sharing, sync, and backup solution developed by CodeLathe that can be self-hosted (on-prem). They provide sync clients for Windows, Mac, and Linux. While the Linux client can serve its purpose, getting it working and accessible can be a bit cumbersome.
Secure NX-API calls using HTTPS with a self-signed certificate.
About a year ago /u/packetsar shared FreeZTP on reddit, just in time for a project that required upgrade/configuration of 400+ IOS-XE switches (3650/3850, several stacks). Over the following months, he was extremely receptive and accommodating with feature updates and tweaks; so kudos, pal.