A FEW years ago? LOL.
And my B550 AMD mobo is SUPPOSED to have PCIE 4. It isn't. Its 3.
Not overusing all caps and "LOL" just makes a post more appealing imho.
Now, "a few years ago" can be different amounts of time depending on your age, so it's all relative.
The comparison still holds true and you see the same discussion almost every time when a new (better) standard is introduced - "who needs that, there's no immediate benefit...".
While this is often true when the new standard is introduced, a few years down the road the situation changes - sometimes faster, sometimes it takes longer.
As I like to re-use electronics as long as possible (will usually turn into hand downs) - which for me makes sense both from an economic as well as an environmental perspective - new standards are important if they allow me to upgrade a system a few years down the road. This does not mean trying to turn a seven year old PC into a high end gaming PC but could be installing a new GPU to support hw decoding of the latest codecs that the CPU cannot handle, faster storage...
Now on to B550. It appears that you have insider knowledge regarding B550.
Me, I am still waiting to see if B550
mainboards support the direct from CPU PCIe 4 lanes (16 for the GPU and four for storage) even if the
chipset does not. This would be good enough for me (vs. going for a more expensive X570 solution)
Technically, there is no reason why the boards themselves could not support this, but we will see if there are marketing reasons (which would be a major disappointment).
Side note: I am a bit disappointed AMD did not release any news about B550. If they did I missed it.