Oathkeeper1775,
Welcome to handloading and thanks for asking our advice. What chamberings do you load?
I will expand a bit on what has already been said.
Bottlenecked cartridges generally headspace on the shoulder, and periodically need to be trimmed in length because the brass "flows" forward to the case neck.
Rimless straight-walled , "pistol" cases headspace on the case mouth and tend to shorten with use.
Straight-walled revolver (rimmed) cases headspace on the rim. They also tend to shorten with use, but not so much as rimless cases.
All cases, bottlenecked, rimless, rimmed, need to be the right length. Rimmed, for getting the proper crimp, mostly. Rimless cases to get the proper headspace and also to get the proper taper crimp. Bottlenecked cartridges, so they will fit in the chamber and have the proper crimp or neck tension.
None of the three types of brass need to be measured every time. Rimmed cases, nearly never. High-intensity bottlenecked cartridges more often than low-intensity bottlenecked cartridges. Rimless cases, as is the nature with semi-automatics, generally get lost before I have ever had to deal with one that was the wrong length.
Obviously, you have already figured out that you can use a turret press in either the "batch" mode or the "continuous" mode.
Just in case you haven't figured it out, "Batch mode" is where you take 20 or 50 or 100 cases and perform one operation on them all, inserting and removing each case as the one operation is performed. This is amenable to inserting off-press operations like primer pocket cleaning, case trimming, etc. When you complete one operation on the entire batch of cases, you move on to the next step. "Continuous mode" processing is where you take one case and perform all the steps, one after another so you go from one empty case to a finished, completed round of ammunition. Then you fetch the next empty case.
Single stage presses practically require you to do processing in batch mode. Progressive presses are at their best in continuous mode (case goes into the press and does not come out until it is a finished round). Turret presses are amenable to either mode of processing.
There is also the possibility (with Turret or Progressive presses) of using a mixed-mode process (do some steps in continuous mode, interrupt the process before completion, do an intermediate step on the batch, then continue to completion in continuous mode again).
The speed advantage of continuous mode processing is, as you discern, there is less insertion-removal of the cartridge case.
Most of us clean and ream (uniform) the primer pockets just once (if even that many times) and do nothing with the length of the brass until one of a particular batch of brass shows signs of a problem, if ever. Then we will check the entire batch. This rarely occurs with handgun brass (rimless or rimmed straight-walled cases) and every 5 to 10 firings (more experienced rifle shooters can correct me here, this is just a guess, fueled by hearsay) with bottlenecked brass.
Good luck, always wear eye protection, especially when working with primers and don't pinch your fingers in your press,
Lost Sheep