Edit: I had assumed the OP was one of the many people I have met who have a Tech Lead title but are not really very technical due to the grandiose request to deprecate checkout. But looking into the blog more I realize that instead the author is more new in their career and I don't mean to be as harsh to someone in that position. Instead to them I would say; when you encoutner something established you don't understand, take it as an opportunity to learn. Git isn't beyond you, it won't take as long to fully understand as you think.