Hi Sal,
I gotta admit that I still enjoy moving parts. I still have a motorized Tamiya tank I built in the 70's and it still runs.
However, most moving parts on models may not last long and will have to be glued in place, i.e., ailerons, landing gear. Hatches on tanks, to make them work, have ugly and unrealistic hinges. That is the drawback.
With armor models, the problem is that vinyl working treads do not sag like the real thing; that is why many modelers glue them in place. Now, not all treads should sag; US tanks' treads were tensioned to be taut and vinyl tracks mimic this authentically.
Then again, some of the new manufacturers of aftermarket tracks make their metal track links to roll!
Sal, build your models to
your enjoyment (an ongoing theme). If you do not, your modeling will not be enjoyable. That sounds obvious, but it is a thread that pops up all the time. You may want to build models for shows, for others' enjoyment--nothing wrong with that, many modelers do. There is no right or wrong way to enjoy this hobby.
For instance, I built an impressive new modern model of the
ME 262 jet fighter. It has an impressive engine and the model company provided clear plastic nacelles. Some modelers think such a practice makes it look toy-like, but I display one of the jets in the clear nacelle. That pleases me.
So enjoy your models and build them as it pleases you.