The place to find/discuss this sort of info is doom9 or videolan poss..
I believe the current "good" players are a well kept secret.
This is to protect the player's firmware for as long as possible.
As long as someone has one & feeds the keyDB you're okay with any player.
I suspect one of the current LG players can be flashed with one of the previous "good" player's f/w. Again, go to the source.
The LG drives can be reflashed with linux flash tool. This tool can extract f/w from drive & the firmware update files..
If you don't have hacked firmware you must keep the f/w updated from manufacturer. When f/w updates stop the BD drive becomes a brick/doorstop/DVD-drive. And you have to find alternative ways to get VUKs etc.
If you pay for makeMKV or AnyDVD you should be fine until the drive gets revoked.
BD players are disposable by design.
BD+ could be a whole new ball-game..