Vern, everything is relative. A stock Model-A generator is really not that difficult to maintain. The reason that Model-A generators fell from use and alternators stepped in for use was due to poor parts availability in the late 70's. No one was making good armatures nor field coils, and the small incidental parts required scrounging at swap meets. That is why the alternator began to be popular. Almost every parts store had one in stock. At that point, I can remember that it was Monkey See, -Monkey Do.
Fast forward to today when a new armature (-actually better quality than original) is available today, new field coils with better wrapping, and all of the small internal parts are available. Even the Cut-out that is available today has a diode that makes it non-problematic. So there really is not any reason that an original generator cannot be restored and used for 50,000+ miles with very little maintenance. The difficulty of fine-tuning is really not that much either but just requires a little effort for about 15 minutes. Most people do not understand how the process works. Batteries today are of better construction, and battery tenders are the norm for most hobbyists that do not use their Model-A frequently (i.e.: several times a week). If starting a Model-A depletes 10% of the battery's reserve, a generator may take 15 minutes to replenish that whereas an alternator takes 5 minutes. If you take a 15 minute ride, what does it matter if it take 5 minutes or 15 minutes? We get so caught-up in our mindset that an alternator is needed. So if the ride only takes 10 minutes, no big deal as the battery only gets returned to 95%. Maybe the trip home takes 20 minutes and the battery gets fully re-charged. Lets suppose you have a battery tender at home. If the charging system in under-charging for the entire day, the tender will replenish it and you are ready for the following trip whenever that will be.
Others also get too hung-up on this deal about needing an EVR to regulate the charging. The Model-A came with a voltage regulator. It is called a Light Switch. If the charging plan is to replenish in 15 minutes but you have a 30 minute trip ahead, just wait the 15 minutes and then turn on the headlights to use some of the extra charging rate the generator is producing. Turn them on and drive for a bit and then switch them off. Doing this, adjusting the Carburetor's GAV, adjusting the Spark Lever, shifting Transmission Gears, depressing the Clutch Pedal, etc., etc. is all what takes the boredom out of driving a Model-A. If you don't feel like doing those things, then go drive a modern car to your destination!