There's no reason, as I have said before, that AMD won't keep the AM4 platform running for a good while longer than anticipated, especially with AM5 being DDR5 only. At some point they will have 'spare parts' they need to make into something, looking at the R5 5500 and below here, and that could be other X3D SKU's or even a low power 65w rated 5900(nonX)3D with lower clocks and more cache, pushing it back to the 105w+. I suppose that is the benefit of such a modular chip design that spans enterprise parts down to desktop and mobile, they can make work what works, and bin others.
There has been much renewed interested in AM4 systems since the X3D results started coming in, and some people who were considering moves to Alder/Raptor have all but forgotten about it as an option, if DDR5 was the excuse to avoid it, it is even more so for them now. Along with the older AM4 upgrades that have been popular since the cheaper parts came out, and the new BIOS support was put in place for the majority of older boards. AMD really have done a cracking job to hold back the incoming tide of Intel, perhaps the tide is now even going out again.