Oil system myths

Well, I get that; there are books written to that effect. But;
firstly, I am a streeter, and secondly,
IMO
if all the oil in the pan got to be stagnant in the head ......... you can imagine how long my rods would survive.

I cut the drain channels in the soft aluminum, at the back, so that the oil could get away faster, wouldn't spill into the valley, and so that contaminants would be washed into the pan, to be trapped from thence, in the filter. And my hope was to redirect the oil falling thru the pockets to find it's way onto the flat-tappet lobes.
Since the engine now has well over 100,000 miles on it,some of them at over 7000 rpm,
IDK,
I think it's working.

As a streeter, I pump a lot of cooling oil up to my valve gear, so it will last for 100,000 plus thousands of miles, I don't care if it costs me power, because I already have enough to go 93mph in the Eighth; yes with the holes and channels.
I mean, that's why I installed the HV pump, not to dump it out the relief and straight back into the pan. No, I installed the HV pump so I could redirect some of it as a coolant to the springs, (which regularly see 7000 to 7200 with 549/571 lift and a 4-speed), and some to protect my expensive aluminum rockers with their roller tips, and some to be blasted onto cylinder walls, thru the piss-holes in the rods.
My engine was screwed together to go the distance, and don't care about some extra windage, or some slight powerloss, which is also why I chose a 360 over something smaller.
My engine also sees a lot of rpm below 1000, cuz it's a manual trans. Sometimes, lots of times, the tach will be saying 550 rpm at 4 mph, because, well, I want to drive 4 mph. So here is another situation where that HV pump is earning it's keep, pumping oil over the valve springs; and my channels allow that hot coulda-been-stagnant oil, sitting on the 207+ degree aluminum heads, to be carried back into the pan ASAP where it can get rid say 30% of that heat.

If my thinking is right, then that long engine life,
is worth far more to me than
the 93mph in the Eighth, which number I only know because I let myself be pressured into going to the track one time. I'm gonna say, that I would give up a bunch of horsepower, to go that 100,000miles.
The Wallace says 93@3456 pounds is 433 hp, with the current set-up.
I have driven that car with more power and with less power, and am confident to say that I would give up between 20 and 50 horsepower, to keep the 100,000 miles. But thankfully, I didn't have to lol.

As you so politely said
"it's worth mentioning"
I find no fault in your assessment.
And in your thinking, perhaps more race-car oriented, I totally understand it.
But my engine spends maybe 98% or more of her life at 5600 rpm or less. Perhaps 60%, at less than 4000rpm.
Cuz, you know, it's a streeter and the speed limit here is 65 mph which being, less than 5600 in second gear,lol, and ~2260 in overdrive.