Intel hasn't done this much since motherboard manufacturers first started messing with default settings with IVB.
I know from experience that motherboard makers started messing around with FSBs and other settings
loooooong before Ivy Bridge, which came out in 2012. For sure there were mobo manufacturers using up to a 103 MHz FSB setting in the Pentium 4 days, and at least in the 101~102 range before that. Pentium III boards running 67~68 MHz instead of 66.67 MHz on the bus also existed.
Back when Tom's Hardware and AnandTech were brand-new sites in the late 90s, there were reviews and roundups that discussed the default bus speeds and how many enthusiast motherboards (esp. Asus and MSI) were goosing the bus and interface speeds slightly just so they'd show up at the top of the performance charts.
The thing is, Intel used to build in much higher margins on its CPUs. Chips sold as "300 MHz" often had at least 20% headroom on basically every chip, so you could run them all at >360 MHz without issue. The word on the street was that binning would identify chips that failed at higher clocks and then rate them for at least 20% lower clocks for retail.
Of course, all the other changes that have happened in the past few decades also play a role. We didn't have multiple cores changing speeds every few microseconds back in the 486 and Pentium days. We just had a static voltage and frequency. Speed Step and all the other tech that dynamically alters clocks, voltages, etc. is great but also adds complexity. This latest generation seems to have much tighter limits, and the mobo vendors just assumed everything was "business as usual."
I'm going to have to go check that MSI video to see what else might be suggested to bring about full stability. I still have occasional quirks pop up, and I can't say for certain whether they're due to the CPU and BIOS settings, or something else.