While browsing on Physics Stack Exchange, I discovered numerous posts (these two are examples) which assert that relativistic mass is an outdated concept used in older textbooks. Looking through my own physics textbooks, I noticed the same dichotomy, of relativistic mass being treated in older texts. I then searched up this concept in Wikipedia wherein it outlined both approaches. It includes a quote from Arnold B Arons:
"For many years it was conventional to enter the discussion of dynamics through derivation of the relativistic mass, that is the mass–velocity relation, and this is probably still the dominant mode in textbooks. More recently, however, it has been increasingly recognized that relativistic mass is a troublesome and dubious concept"
which seems to corroborate the idea that relativistic mass is outdated.
Based on these points, I have the following questions: What are the origins of this movement which question the concept of relativistic mass? When did textbooks begin to abandon the old approach and adopt the new approach? What are the reasons for the abandoning of relativistic mass, beyond those outlined by Arnold B. Arons and Taylor and Wheeler (which are provided in wikipedia, whose explanation I still don't completely understand)?