It was certainly true.
Today, however, when most seminarians enter after college, or even later, altar service could hardly qualify as a "training ground" for priests.
You prove my point for me.
Besides, there's very little for servers to do at Novus Ordo Masses.
There is quite a bit for acolytes to do at reverently celebrated Masses of the New Rite, especially when the priest decides to actually leaf through the GIRM.
Huh? You say that altar service provides a recruiting ground for priests, I say it doesn't because most men entering seminaries enter later, and you say "I prove your point"?
Actually, I disprove your point.
They were also probably thinking that their ideas would receive a fair hearing.
This "proposal" is dead on arrival. It has nothing to do with "reverence," and more to do with rolling back "innovations" that some folks at the Vatican don't like. Reverence has nothing to do with manner of reception of the Eucharist.