As someone who built - and particularly upgraded - a number of machines in the AM2/AM3 era, it was very relevant to me
It's one of the main reasons I'd seriously consider AM4 if I needed a new desktop at the minute - a £70 B350 motherboard will take anything from a £45 dual core APU to a ~£450 8C/16T high-end desktop CPU, with a huge range of processors available at retail right now, but it should also be good for at least two more generations of Zen-based CPUs and APUs, which gives immense potential for future upgrades.
In fact, I've been considering new parts for my stepson who's after a CPU upgrade (from an i3 on s1155). Now, I could pick up an i5 3570 for around £50 - £60, but given the improvements AMD have made with the Zen core it occurred to me that perhaps even a lowly Ryzen 3 might still be a reasonable upgrade. So I went and did some digging, and it turns out that a Ryzen 3 1200 - £95 brand new - has almost identical performance to an i5 3570.
So, do I get my stepson a simple CPU upgrade that will leave him with nowhere to go on an obsolete platform, or give him a new start at the bottom of a platform that will run for at least 2 more generations? Yeah, bit of a no-brainer, that one