Chipsets can be funny things, if you have an eye for it. Let me give an example.

During the days of the various FM sockets (FM-1, FM-2, FM-2+) the high-end chipset was changed with each socket

FM1: A75; FM2: A85; FM2+: A88
The low-end A55 chipset however soldiered on from Socket FM1 right up to Socket FM2+, just as some cheap AM3 and AM3+ boards still featured ancient AM700-series chipsets, while there were high-end AM800 (Socket AM3) and AM900 (Socket AM3+) series as well.

In the new AM4 socket we see the same thing again: the high-end X370 chipset was followed by the X470, which soon will be replaced with the X570 as the super-chipset.
The medium segment saw the B350 chipset making place for the B450 chipset, which might very well be replaced in its turn with the B550 later this year.
The low end A320 chipset however already saw two generations of Ryzen CPUs/APUs and might very well greet yet another generation.

To top it of, the AMD's low-budget AM1 platform didn't need a chipset at all, as the CPUs that were used in them were SOCs (as in System-On-a-Chip), CPU, GPU and Chipset happily blended together.
This gave the hypothetical opportunity to use the AM1 boards with both x86 SOCs and ARM SOCs, which unfortunately never occured. You would have to flash the BIOS before such a change of course, but we've all been there and done that before, haven't we?