both Intel and AMD have historically been pretty bad about being stingy about PCIe lane availability
- Hold up, I thought some of the nicer AM3+ boards using the 990FX chipset had a fair bit of lanes available both for their time and even now still. Like, the best 990FX boards on AM3+ had more expansion than the X370/470/570 boards on AM4 or the best X670/X870 boards on AM5 last time I thought.