I think i paid $75 or $90 probably a decade ago or more now and think it was worth it, and still use it, but $750 is just nuts. At this price, they clearly don't want anyone actually buying it but without having to face the backlash of outright removing the option altogether. I would imagine one of their next steps will be to remove or restrict people like me who bought it long ago. We'll probably get locked to a specific version that comes out right before some major update that fixes long held issues that people have complained about for years.

I would switch to Jellyfin but Plex makes sharing secure and easy and it is full of great features for the price I paid long ago. I also have a lifetime pass with Emby that I bought during a dark period of Plex but they also went closed source (which spawned Jellyfin into existence) and always felt much less refined than Plex in most areas.

I think you can setup Jellyfin for Kodi.