These types of discussions always are cost related and based upon that in virtually every case I have ever noted and that's been, well a lot. Where the new flier or the long belated returnee starts out with old stuff even stuff not all that old they soon (very soon) are out there shopping for new modern units that are the latest greatest and its fact that almost all spent a net cost far, far greater than if they had bought the very newest and most capable they could afford in the first place.
Now there most certainly are exceptions to this and there always is when the subject is aviation full or miniature scale. The primary one is folks like myself and please forgive the mini bio. When it comes to RC was fortunate to have achieved remotely controlled flight in 1959 after two years of attempts with a home made unit. Of course there was controlline before that (and proud to say still is)
But back to RC so after five different RC units up to 1970 is when I purchased my lovely Orbit six channel genuine proportional

Anyway I still have this one today 45 years later after its long sleep when it became illegal to fly in 1991. few year back after the advent of 2.4 and considerable cost along with the help of two local electronic wizards I was able to convert to 2.4 and was able to fly my treasured old sticks agine in a period correct airplane. What a joy that was and is, I can assure you that is pure nostalgia with not any factor at all. I also can assure what we thank as a perfect radio most certainly is not , agine pure nostalgia at any cost.
Another example is starting with the oldest and first Hitec 2.4 radios I have three Prism 7X's, Three Eclipse 7's, Three Aurora 9's transmitters. All have many airplanes on them and all are on 2.4. The oldest is a dedicated controlline Tx that I wear backward on a strap in front of my chest with sticks pointing toward the airplane, This allows me to still fly ukie in my wheelchair.
Two years ago I pursued turbine flight (and wonder why did I wait so long) and immediately found I had run out of channels so I moved to the dark side and purchased a Futaba 14sg Now with three wonderful turbine ships and one being admittedly eclectic a new Cadet senior I built out of a kit with both glow and true gas turbine power as well as RC, controlline, wheel and float capabilities many wheeled flights and four excellent flights just this weekend first time on floats The controlline maidens will have to wait till probably next summer due to maintenance and modifications of the controlline circle.
Agine my apologies and this eclectic nostalgia is fine but otherwise I can say the good old days were not great and I would never recommend to most people to do anything but firs buy new as well as the most capable units you can afford

To those few who are likely just passing through before moving on to the next adventure anyway, If they are out a few bucks more, Well heck I just don,t care. Who I care about are our newfound friends and flying buddies that's who I care about.
Only just my opinion
John