A lot of things I don't agree with in that video. James hit most of them, so I don't need to repeat. However, his final recommendation that the 8300 has staying power is almost laughable. At the beginning he's complaining that its uArch Is five years old, but then he says it will have staying power for five more? If you're going to build a new computer, why go for Pile Driver when Zen is on the horizon? I don't find it impressive that an FX-8 can still hang with a Skylake i3 when product history and pricing is considered. How much did these chips cost and what market segment did they target when they first came out? It's no different than saying it's "impressive" that a Sandy Bridge i5 can still slightly outperform a new i3 in certain tasks.
As for the rest, yes, it's a 95W chip instead of 125W of the higher 8000 SKUs. I wasn't talking about CPU compatibility with the mboards. I was talking about overclocking. Any AM3+ board can handle this chip at stock speeds, but you'll need to spend extra if you want any meaningful overclock. And don't forget the cost of a third-party cooler in that as well.
The idea of "upgrading" to an FX-8000 for the people still stuck on AM3(+) doesn't make any sense either. Sure, let's say someone is still using an FX-4100 or 6300, or even an older Phenom as you say, for the past four years or more. They want to upgrade their system. What does moving to an FX-8000 net them? The older Bulldozer chips get an ok upgrade in moving to Pile Driver uArch, but that's it. It's arguable the Phenom uArch is superior to either BD or PD. Everything else stays the same. You're still using the same old mboard with its likely limited connectivity ( no PCIe 3.0, no USB 3.0, no M.2, and crappy RAM controller ). If your platform itself is old, upgrading the CPU doesn't solve your problems.
If you're on an aging AM3 system and want to get the most meaningful upgrade for as little as possible, you tell me what's better: spending $120 for a new CPU, or spending $180 - $200 on an i3-6100 and basic DDR3 LGA1151 board that gets you a number of new features aside from CPU speed.