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On top of that what constitutes 4K, certainly not just a disc standard, you can make H.264, H.265/HEVC and VP9 videos in 4K not to mention AV1 in the works designed to replace all of those over the next decade. It doesn't look like this been upgraded to some kind of 4K standard and even if it were what would play it other than a handful of 4K Blu-ray disc players which are a niche item these days as only high end AV people are buying these any more (average people are not). The home movie format for discs such as it was used AVCHD which allowed burning to BD with menus and I believe some reverse engineered Blu-ray menus to make their own too. Burned discs have a shelf life the chemicals in them will degrade over time so they are only going to last so long.
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