Didn't anyone tell you not to start a sharpening thread?
I'm sure there are loud sirens go off for a certain member whenever the word "sharpening" appears. He should change his avatar to a huge ancient oilstone.
The fact is you can use whatever method suits you depending on your turning habits, existing equipment and budget. I, at various time do a fair bit of turning, I have a number of systems and tried most but use what I find easiest, quickest and most effective.
* I had a Tormek T7, great machine gives a razor edge and good for bench chisels and plane irons but I didn't like it for turning tools. (I recently sold that).
* Bench grinders, I have a couple but these days are used for general grinding not sharpening apart from cold chisels and drill bits. Just std 6" wheels btw
* Oilstones, effective but messy and I wouldn't dream of using them on my turning tools there are far better methods.
* Diamond plates, my go to for all my bench chisels, carving tools and plane irons these days, too slow for turning tools which need a constant touch up
So that leaves me with my tried and tested Pro-edge which I use for turning tools. I bought it s/h years ago and it's simple, easily repeatable angles takes seconds to put an edge on a tool and unless re shaping you don't need to dunk in water. I use a 240g belt which for me gives a nice edge, fine enough to burnish the wood with a skew but I have other grades if I want them, and the belts last for a long time.
Angles aren't that important imo but it can be helpful to change depending on the material you're turning which is why turners often have duplicate tools. I don't look what angle I need, just loosen the rest plonk the tool on the rest, offer up to the belt and slot the lock into the corresponding hole, takes maybe 10 seconds to repeat the angle and just touch the edge.
There are arguments that hollow grinding removes less metal, I don't buy into that as you're just removing the metal earlier in the process and I've had the same chisels for decades and they'll still have plenty of meat on them long after I'm gone.
I'm not recommending you use what I do, there are as many opinions as there are woodworkers but they are just that - opinions. Try a few methods, go to a men's shed or join a club and try stuff out without having to buy and you'll find what suits you, we're all different.