The more I come into contact with new routines and methods the more they start to look the same, maybe a combination of senility or that they're not actually that different. I'm sure there's a bit of both in there.
You train 3 times a week for 5x5 long enough (arbitrary routine) and you'll grow to be strong enough to handle that. Which is fine if that's what you want. If you want more eventually you will need to do more.
More Volume seems to be the key, that volume has to come from somewhere either the lift itself or something else.