The VRMs have never been an issue for me either. The way they were marketed has for sure, but that's an issue that has no bearing on how stable this motherboard is.
There's plenty of other examples of the Maximus line doing really well with the 9 series so in the real world it's a non issue. Despite this evidence being available prior to and even more so since the VRM marketing blunder, it is something people tend to mention when the z390 asus line comes up, hence my comment.
As you've seen yourself, the number of VRMs a board has isn't the be all and end all of overclocking or power delivery.
And yeah, the BIOS is nice.
See how far you can push that CPU before you settle on your daily overclock!