When AMD presented its AM4 platform, it assured that it would support it until 2020, demonstrating a level of compatibility with unprecedented future processors. Any user who has a motherboard from the first-generation B350 or X370 Ryzen can be done with a third-generation BIOS update-as long as the erector of your board also makes it possible. The X570, X470 and B450 plates, on the other hand, will be compatible with the Ryzen 3000 series.
Where AMD has had to be reserved in the A320 plates, which according to the graphic you have up here. It is worth mentioning that these plates represent the AM4 market and that most of them are only installed in pre-assembled systems. Returning to the compatible AM4, if by the time the Ryzen 3000 reaches the market on July 7th you will take the leap, check first in the official pages of MSI, Asus, Gigabyte and company if they offer real compatibility. In theory, the “Matisse Ready” BIOS updates have already begun to be distributed.
One fact that we do not want to leave out that the X570 plates are not retrocompatible with the first generation Ryzen, possibly because of limitations of the BIOS memory size. With this the new plates become exclusive of the second and third generation, apart from losing compatibility with Bristol Ridge processors. In case you need a first incentive to be interested in the new AMD processors, why do not you check the official specifications of the 3rd generation Ryzen?