Outdated studies of protein requirements

Good morning Dr. Darden,

watched a couple youtube videos from some some well known HIT enthusiasts (not gonna mention names) and they have indicated that Arthur Jones, Mike Mentzer and Ell Darden’s research on protein requirements are outdated…i.e. they indicate the RDA suggestions are way too low and trainees or even seniors need alot more protein 1.5 to 2 grams per 1 lb of body weight

would love to hear your outlook on this…is your research outdated, have you changed your mind on this matter or do you stick with all your writings thru out the last 50 years