I'm pretty sure Vista Outdoors (Federal, Speer, CCI, RCBS, Alliant Powder, Hoppes #9, Tasco, Bushnell, Camelbak, etc., etc.) will still make Golden Sabers. Remington brand ammo is just another one of their brand portfolio now:
https://vistaoutdoor.com/brands/Remington also owned Barnes bullets, but I think their Mona UT factory went to a different bidder (Sierra bullets).
The Golden Sabers for 38/357 come in two types. One is for 38 Special and it opens a lower velocities. It will overexpand and penetrate poorly at high velocities (357 Magnum). There is a different Golden Saber for 357 Magnum. It won't expand well at 38 Special velocities, but will penetrate better at 357 velocities.
Last year, Midway was selling the Golden Sabers for about $0.14 each. I think they're worth that. They work great for blowing up liquid targets. Nowadays, I would not expect them to become worth much more than in the past due only to Remington's disposition. However, .357" jacketed handgun bullets have become scarce. My reasoning is that the factories that normally produce some are at full-tilt pumping out 9mm to meet the demand. Nobody is taking a break from that for the few 357 guys. What's easier to find right now are cast bullets like SWC. Those machines aren't tied up with 9mm orders. Will there be some 38/357 reloaders out there that will pay high prices? I would say it's possible if market conditions worsen but the demand won't be exclusively for Golden Sabers.