Is there any motherboard which is available right now which supports 3300xA B550 mobo when they launch in June so you could upgrade to Ryzen 4000 or 5000 down the road.
400 series boards reportedly won't support anything newer than Ryzen 3000.
AMD's mobo release scheduling is a major dumpster fire. B550 is going to need to have ubiquitous "BIOS Flashback" feature set or they're only going to support the Ryzen 3100 & 3300X. Ryzen 4000 going to launch later this fall and will be a mess if B550 needs a 3100 or 3300X to perform the update to support them....ugh.