I won't respond with my opinion, but I will post a couple interesting reads so folks can formulate their own. Now, if someone from the "break-in isn't necessary camp" could do the same, I think we could have an interesting conversation.
https://www.compcams.com/pub/media/w...chBulletin.pdf
https://help.summitracing.com/app/an...and-lifters%3F
https://www.melling.com/wp-content/u...Rev4-12-07.pdf
https://www.mahle-aftermarket.com/na...procedures.jsp