I highly doubt bluray players/transports for blu-ray audio are going obsolete any time soon...
Panasonic is bound to keep it alive...Sony playstation consoles will be around forever...thanks to the ever growing number of gamer dudes. In fact, i believe sony has been killing other manufacturers off (yamaha, for instance) w.rt the bluray market. Essentially, they take a loss with ps5 player/console sales & make their money with game sales and subscriptions. But, to be fair, the ps5 is a very high quality bluray transport for audio. I wouldn’t know about video, am not a videophile.
The future of sacd could be bleak.
I would say get a universal disk transport with HDMI outputs, and some SACDs, Blu-ray audio disks, 4K opera recordings and CDs. You will always have your media, and it will always be as new because it won’t wear out. Keep your fingers crossed that somebody will still be making transports if yours carks it!