Potting soil

I'm trying to find a good potting soil to pot up some rooted perennial cuttings to plant next spring. I've done alot of research and so far it seems like Al's 5-1-1 recipe seems like a popular choice. I have been reading about this person's experience with it https://www.google.com/amp/s/threefold.farm/blog/making-your-own-potting-mix%3fformat=amp . It seems after a few years they moved to a mix of 50-50 pine bark and compost. I like this mix because bulk pine bark and compost are really easy and cheap for me to get. What do you folks think is this simple recipe too good to be true?

I believe the bark and compost would work. Preferably it should be milled pine bark. I recently read about  the potential of growing blueberries in 100% milled bark. It is supposed to have great water retention and has a compound that resists rotting. Also being pine it is a bit acidic which blueberries love though I would think that would balance out with the addition of compost.